AC Motor Noise In My Audio: Causes, Common Types, And Elimination Techniques [Updated: April 2025]

AC motor noise in audio comes from various sources. Key causes include electrical interference, noise from input wiring, and bearing noise. Loose parts can cause rattling sounds. Transformer noise and ground loops may also contribute to the issue. Using methods like an AC power regulator can help eliminate this unwanted noise in studio recordings.

Common types of AC motor noise include hum, buzz, and chatter. Hum is a low-frequency noise that usually results from line frequency interference. Buzz manifests as a higher frequency sound, often linked to vibrations in the motor casing. Chatter is an irregular sound caused by inconsistent operation, possibly due to mechanical issues.

Elimination techniques include proper grounding of the audio system, using high-quality power supplies, and employing ferrite beads on cables to suppress noise. Placing AC motors away from audio equipment can also reduce interference. Isolation pads may help absorb vibrations, further minimizing acoustic disturbances.

Understanding AC motor noise in audio systems equips users to take effective measures. The subsequent sections will explore the impact of these noises on audio quality and delve into advanced mitigation strategies. Transitioning into these topics will enhance overall audio performance, ensuring a clean listening experience free from unwanted interruptions.

Table of Contents

What Is AC Motor Noise and How Does It Affect My Audio?

AC motor noise is unwanted sound produced by alternating current (AC) motors during their operation. It can manifest as humming, buzzing, or clicking sounds and can interfere with audio equipment performance and sound clarity.

The National Institutes of Health defines motor noise as “any vibration-induced sound that may disrupt electronic signals and cause degradation in audio quality.” This definition underscores the significance of understanding how such noise can influence audio systems.

AC motor noise arises from multiple aspects, including mechanical vibrations, electrical interference, and aerodynamic noise. Each aspect contributes to how the noise can affect the surrounding audio environment.

According to the International Electrotechnical Commission, noise can be classified into two main types: mechanical noise, resulting from vibrations, and electromagnetic noise, caused by electrical currents. Both types can impact audio performance in different ways.

Common causes of AC motor noise include motor design flaws, poor installation, and environmental factors like high ambient temperatures. These elements can exacerbate noise levels and affect audio quality.

Research by the Institute of Electrical and Electronics Engineers indicates that over 60% of audio system problems can be linked to electrical noise from motors and other equipment. Addressing these issues can significantly enhance audio clarity and performance.

AC motor noise can disrupt the listening experience, leading to listener fatigue and reduced satisfaction. It can also affect professional audio production quality during recording and broadcasting.

Socially, increased motor noise can contribute to urban noise pollution, impacting mental health and overall quality of life. Economically, it may lead to reduced productivity in workplaces where audio quality is critical.

Specific examples of the impacts include noisy air conditioning systems affecting podcasts and broadcast radios, compromising audio transmission over live events.

To mitigate AC motor noise, the American National Standards Institute recommends implementing soundproofing techniques, using vibration isolation pads, and investing in high-quality motors designed for quiet operation.

Effective strategies to reduce the noise include regular maintenance of motors, selecting low-noise motor designs, and employing noise suppression technologies such as filters and dampening materials.

What Are the Common Types of AC Motor Noise in Audio Systems?

The common types of AC motor noise in audio systems include electrical noise, mechanical noise, and airborne noise.

Electrical noise
Mechanical noise
Airborne noise

These types of noise can significantly impact audio quality. Understanding these sounds helps in effective noise mitigation.

Electrical Noise:
Electrical noise arises from the electromagnetic interference generated by the operation of the motor. This noise can distort audio signals and is often caused by current fluctuations in the motor. According to a study by Chen (2021), electrical noise is often characterized by its high-frequency components, which can leak into audio systems. Typical sources include poorly shielded wiring or faulty grounding. This type of noise may manifest as buzzing or humming sounds in the audio output.
Mechanical Noise:
Mechanical noise originates from friction and vibration within the motor components. When parts such as bearings or stators wear out, they create unwanted sounds. As noted by Smith et al. (2020), mechanical noise can vary in pitch and volume, depending on the motor’s operating conditions. Common symptoms of mechanical noise include rattling or grinding. Regular maintenance can often reduce this type of noise by ensuring that all moving parts are adequately lubricated and aligned.
Airborne Noise:
Airborne noise refers to the sounds transmitted through the air, resulting from the motor’s operational sounds. These sounds often include hums, whirs, or fan noises, which can be particularly distracting in quiet environments. Research by Thompson (2019) emphasizes that airborne noise is often amplified in enclosed spaces, like recording studios or home theaters. Soundproofing measures, such as acoustic panels, can minimize the impact of airborne noise on audio quality by absorbing sound waves and reducing reverberation.

What Is Mechanical Noise from AC Motors?

Mechanical noise from AC motors refers to unwanted sound generated during motor operation, often resulting from vibrations or mechanical interactions between components. This noise can arise from bearings, rotor imbalance, or misalignment in the motor structure.

According to the U.S. Department of Energy, mechanical noise can interfere with system performance and may indicate underlying mechanical issues. This definition highlights the significance of monitoring noise levels as an indicator of motor health.

Mechanical noise encompasses various types such as buzzing, humming, and rattling. Each type may indicate specific mechanical issues related to motor operation, installation, or ongoing maintenance. Understanding the type of noise can help diagnose the cause and inform corrective actions.

The International Electrotechnical Commission defined mechanical noise as sound resulting from mechanical vibrations. Such noise can arise from rotating parts, friction, and air movement within the motor, further emphasizing the importance of understanding its sources.

Common causes of mechanical noise in AC motors include poor lubrication, worn bearings, and loose components. Environmental factors, such as installation location and nearby equipment, can also contribute to increased noise levels.

Research from the National Institute of Standards and Technology indicates that noise levels above 80 decibels can lead to hearing damage over prolonged exposure. Maintaining AC motors and monitoring noise can help mitigate such risks.

Mechanical noise can adversely impact workplace productivity, employee health, and overall system efficiency. Reducing noise fosters a more pleasant working environment and promotes better operator focus.

The World Health Organization cites instances where long-term exposure to noise pollution can lead to stress-related health issues, highlighting the importance of addressing mechanical noise in AC motors.

Examples of mechanical noise impacts include decreased morale among workers in noisy facilities and increased operational costs related to equipment maintenance and health impacts.

To address mechanical noise, experts recommend regular maintenance, proper alignment of motor components, and using quieter motor designs. Organizations like the American National Standards Institute advocate for compliance with noise control guidelines.

Strategies to mitigate mechanical noise include installing vibration dampeners, using noise-insulating materials, and employing advanced monitoring technologies for early detection of noise-related issues.

What Is Electrical Noise Generated by AC Motors?

Electrical noise generated by AC motors is unwanted electrical signals or disturbances that can interfere with the operation of electrical systems. These disturbances typically arise from the motor’s operation, leading to fluctuations in electrical current and electromagnetic fields.

The International Electrotechnical Commission (IEC) describes electrical noise as any electrical signal that can interfere with the performance of electrical equipment. This noise can originate from various sources, including switching actions within the motor and interactions with nearby devices.

The main aspects of electrical noise include its frequency, amplitude, and duration. High-frequency noise can affect sensitive electronic devices, while low-frequency noise may influence the performance of motors and other machinery. Additionally, noise can manifest as both conducted and radiated interference, with each type affecting different systems.

According to the IEEE, electrical noise can be classified into several categories, including thermal noise, shot noise, and flicker noise. Each classification has specific characteristics and can influence different types of electronic equipment and facilities.

Common causes of electrical noise in AC motors include mechanical vibrations, poor electrical connections, and insufficient grounding. External factors such as nearby electronic devices can also contribute to this noise.

Research by the National Renewable Energy Laboratory indicates that up to 30% of the energy loss in an electrical system can be attributed to noise interference. Addressing these issues becomes critical in maintaining energy efficiency and system longevity.

Electrical noise can lead to user discomfort, reduced equipment lifespan, and increased operational costs. Additionally, it can compromise data integrity in communication systems, affecting both industrial and consumer applications.

Health issues may arise from long-term exposure to operational noise, which can lead to stress and other complications. Environmentally, noise pollution from motors can disrupt local wildlife. Economically, higher operating costs due to inefficient machinery can impact business profitability.

Specific examples include manufacturing facilities where excessive noise disrupts workflow and contributes to employee dissatisfaction. Additionally, hospitals and laboratories require low-noise environments to ensure the accuracy of sensitive equipment.

To mitigate electrical noise, it is recommended to implement proper grounding techniques, use noise filters, and employ better motor design. Experts from the Institute of Electrical and Electronics Engineers (IEEE) suggest adopting shielded cables and isolation transformers.

Strategies to address electrical noise include regular maintenance routines, vibration dampening solutions, and the installation of active noise-control devices. Utilizing higher-quality components in the overall design can significantly enhance resilience against electrical noise, ensuring smoother operations and improved reliability.

What Causes AC Motor Noise in My Audio?

AC motor noise in audio systems is typically caused by electromagnetic interference, mechanical vibrations, and poor grounding.

Electromagnetic Interference (EMI)
Mechanical Vibrations
Poor Grounding
Component Quality
Improper Installation

The aforementioned points highlight the diverse reasons behind AC motor noise, each with unique implications for audio fidelity.

Electromagnetic Interference (EMI): Electromagnetic interference (EMI) disrupts audio signals due to electromagnetic fields emitted by AC motors. These fields can induce noise in audio circuits, leading to hum or buzz. Studies show that EMI is more pronounced in devices improperly shielded. For instance, a study by Zhang et al. (2021) demonstrated how shielding materials can reduce EMI in audio applications by 30%.
Mechanical Vibrations: Mechanical vibrations from AC motors can transfer into audio equipment, creating unwanted sound. The vibration frequency may interfere with the audio signal, particularly at low frequencies. Research indicates that vibration isolation mounts can mitigate such effects. In a case study, a manufacturer reduced noise levels by employing isolation techniques, resulting in a 40% decrease in perceived noise.
Poor Grounding: Poor grounding can lead to ground loops, which contribute to audio noise. If an audio system and an AC motor share a common ground that is improperly configured, it can result in a noticeable hum. Ensuring that all components are correctly grounded can eliminate these issues. According to the Audio Engineering Society, proper grounding practices significantly enhance sound quality in audio systems.
Component Quality: The quality of components used in audio and AC motor systems can influence noise levels. Low-quality capacitors or inductors may generate noise that interferes with audio signals. A comparison study by Martin (2020) found that using higher-grade components reduced noise interference by 25%. Investing in better components can thus enhance overall audio performance.
Improper Installation: Improper installation of AC motors or audio equipment can introduce noise issues. Ensure that all connections are tight and that equipment is appropriately mounted to prevent rattling. A well-documented case involved a sound engineer who resolved noise problems by simply re-securing audio cables and repositioning equipment, resulting in a cleaner audio output.

Understanding these factors allows users to identify and address AC motor noise effectively, improving audio quality in their systems.

How Does Poor Shielding Contribute to AC Motor Noise?

Poor shielding contributes to AC motor noise by allowing electromagnetic interference to affect nearby electronic systems. AC motors generate magnetic fields when they operate. These fields can emit noise in the form of electromagnetic waves. If the motor lacks proper shielding, these waves spread into the surrounding environment.

This leakage can disrupt the operation of nearby audio equipment. Sensitive components in audio devices pick up this noise, resulting in unwanted sound distortion or hum. The lack of effective shielding serves as a path for potential interference, which directly impacts performance.

Furthermore, poor shielding can lead to increased stray currents. These currents can create ground loops, adding further noise to the audio signal. In summary, inadequate shielding facilitates the transmission of electromagnetic noise from the motor, which subsequently affects audio quality. Proper shielding can mitigate these issues by blocking the electromagnetic interference and safeguarding adjacent systems.

What Role Does Grounding Play in AC Motor Noise?

Grounding plays a crucial role in reducing AC motor noise by providing a path for electrical currents to flow safely to the ground, thus minimizing electromagnetic interference and enhancing system stability.

The main points related to the role of grounding in AC motor noise include:
1. Reduction of Electromagnetic Interference (EMI)
2. Enhanced Equipment Protection
3. Improved Signal Quality
4. Ground Loops Impact
5. Compliance with Safety Standards

Understanding these points provides insight into the importance of proper grounding practices.

Reduction of Electromagnetic Interference (EMI): Grounding reduces EMI by directing stray electrical currents away from sensitive components. This occurs because grounding creates a low-resistance path for electrical noise, thereby lowering the potential for interference. According to a 2019 study by Gupta and Sharma, properly grounded motors showed a significant 30% reduction in noise levels.
Enhanced Equipment Protection: Grounding provides essential protection to equipment from voltage surges. If there is a fault in the motor or its wiring, grounding ensures that excessive voltage is diverted away from the equipment. This not only prevents damage but also extends the lifespan of the AC motor. The National Electrical Code (NEC) emphasizes proper grounding as a best practice for maximizing equipment protection in electrical installations.
Improved Signal Quality: Grounding enhances the quality of signals in signal-sensitive applications. It minimizes noise that could distort measurements in systems using sensors or feedback loops. For example, in industrial automation systems, proper grounding can lead to clearer readings and more reliable operations.
Ground Loops Impact: Ground loops occur when there are multiple grounding points, leading to different voltage levels. This phenomenon can actually increase noise instead of decreasing it. A 2020 report by Smith and Co. highlights that systems with multiple grounding points faced increased electromagnetic noise, which adversely affected equipment performance.
Compliance with Safety Standards: Proper grounding is often a requirement for compliance with electrical safety standards. Organizations such as the Institute of Electrical and Electronics Engineers (IEEE) stress the critical role of grounding in maintaining safety and functionality. Non-compliance can lead to unsafe conditions and potential legal issues.

Through understanding these aspects, it becomes clear that proper grounding is essential for mitigating noise in AC motors, enhancing performance, and ensuring safety in electrical systems.

How Can I Identify AC Motor Noise in My Audio System?

You can identify AC motor noise in your audio system by observing specific symptoms, checking connections, and using diagnostic tools to analyze the sound.

To effectively identify AC motor noise, consider these key points:

Symptoms of Noise: Listen for audible sounds such as humming, buzzing, or clicking. These noises are often associated with interference from nearby electrical devices or motors.
Assessing Connections: Inspect all connections in your audio system. Loose or corroded cables can introduce noise. Ensure that all cables, especially power and ground wires, are secure and well-maintained.
Using Diagnostic Tools: Employ an oscilloscope or a spectrum analyzer to detect and visualize the noise. These tools can help you pinpoint the frequency and amplitude of the unwanted noise, making it easier to identify its source.
Checking Grounding: Ensure your audio equipment is properly grounded. Poor grounding can create a ground loop, leading to significant noise interference. Studies show that proper grounding can reduce noise by up to 90% (Baker & Lee, 2021).
Isolating Devices: Try unplugging devices one at a time to see if the noise persists. This can help isolate the source of the noise. Sometimes, certain devices may create electromagnetic interference (EMI) that affects audio quality.
Environmental Factors: Assess the location of your audio equipment. AC motors operate best with minimal interference. Relocating audio devices away from motors or using shielded cables can help.

By following these steps, you can diagnose AC motor noise in your audio system effectively. Managing these factors will help maintain the clarity and quality of your sound.

What Techniques Can Effectively Eliminate AC Motor Noise from My Audio?

To effectively eliminate AC motor noise from your audio, consider the following techniques.

Use Ferrite Beads
Employ Noise Filters
Implement Shielded Cables
Install Isolating Mounts
Utilize Grounding Techniques
Optimize Layout and Proximity
Ensure Equipment Enclosures

These techniques cater to various ways of addressing AC motor noise, offering both passive and active solutions. In addition, opinions on effectiveness may vary based on specific environments and setups.

1. Use Ferrite Beads:
Using ferrite beads helps reduce high-frequency noise in audio systems. Ferrite beads work by suppressing electromagnetic interference (EMI) and can be easily attached to wires connected to the audio equipment. According to a study by the IEEE in 2021, incorporating ferrite beads resulted in a 50% reduction in noise levels in AC motor applications.

2. Employ Noise Filters:
Employing noise filters eliminates unwanted sounds by conditioning the power supply. These filters can be active or passive. Active filters adapt to the noise spectrum, while passive filters block specific frequency ranges. Research by the Journal of Acoustical Society of America (JASA) in 2020 found that proper filtering can reduce overall noise pollution in audio systems significantly.

3. Implement Shielded Cables:
Implementing shielded cables minimizes the intrusion of noise into audio signals. Shielding covers the wires, preventing interference from external sources. A 2022 study by Sound Engineering Journal highlighted that using shielded cables cut down the noise considerably in setups involving AC motors.

4. Install Isolating Mounts:
Installing isolating mounts reduces vibrations transferred from the AC motor to the audio system. These mounts absorb shock and minimize noise propagation. According to a report from the International Journal of Mechanical Engineering in 2021, isolators can decrease motor noise by over 30% in certain applications.

5. Utilize Grounding Techniques:
Utilizing effective grounding techniques ensures that all audio equipment is properly grounded, minimizing electrical noise. Poor grounding can lead to hum and buzzing in audio lines. The Audio Engineering Society (AES) reported in 2021 that proper grounding is crucial for achieving clean audio signals and reducing noise interference.

6. Optimize Layout and Proximity:
Optimizing the layout and proximity of devices can lessen noise. Keep audio equipment away from AC motors and other sources of interference. A layout study by the Australian Institute of Electrical Engineers in 2020 recommended specific distances to separate sensitive equipment from noise sources, achieving a quieter environment.

7. Ensure Equipment Enclosures:
Ensuring that audio equipment is housed in solid enclosures can provide protection against noise. Enclosures made of materials that block sound, like steel or heavy plastic, formulate an effective barrier against motor noise. Research from the Institute of Sound and Vibration Research in 2022 confirms that well-designed enclosures can significantly suppress unwanted noise in audio systems.

How Does Proper Grounding Address AC Motor Noise?

Proper grounding effectively addresses AC motor noise by minimizing electromagnetic interference and providing a path for unwanted currents. Grounding systems establish a low-resistance connection between electrical equipment and the earth. This connection reduces voltage differences and prevents noise from affecting sensitive components.

First, identify the sources of noise. AC motors often generate electrical noise due to switching actions within their circuits. These actions can create voltage spikes. Grounding helps dissipate these spikes through the earth connection.

Next, ensure that the grounding system is properly designed and installed. Use a dedicated grounding conductor that connects all metallic parts of the motor and related equipment to a common ground point. This step ensures that all potential noise paths are addressed.

Then, maintain proper grounding continuity. Inspect grounding connections regularly to prevent degradation. Loose or corroded connections can increase resistance, allowing noise levels to rise.

Lastly, utilize filters in conjunction with grounding. Noise filters can further suppress high-frequency noise generated by the motor. When combined with proper grounding, these filters significantly reduce overall noise levels.

In summary, proper grounding addresses AC motor noise by minimizing interference and providing a pathway for unwanted electrical surges. By ensuring a well-designed grounding system, maintaining continuity, and using additional filtering techniques, one can effectively reduce noise and improve the performance of audio systems.

What Isolation Techniques Are Effective in Reducing AC Motor Noise?

Effective isolation techniques can significantly reduce AC motor noise.

The following techniques are commonly recognized for their effectiveness in reducing AC motor noise:
1. Vibration isolation mounts
2. Soundproof enclosures
3. Acoustic barriers
4. Damping materials
5. Massive foundation

To better understand these techniques, it’s crucial to explore how each method contributes to noise reduction in various scenarios.

Vibration Isolation Mounts: Vibration isolation mounts reduce noise by absorbing vibrations generated by AC motors. These mounts support the motor and prevent vibrational energy from transferring to the building or surrounding structures. According to research by B. S. Noroozi and M. Vasjoo (2019), using rubber or spring mounts can lead to a 30-50% decrease in noise levels.
Soundproof Enclosures: Soundproof enclosures serve to contain and diminish noise emanating from the AC motor. These enclosures use sound-absorbing materials that help minimize sound escape. A study by D. A. O’Neill (2021) shows that using enclosures can reduce noise by up to 15 dB, which is significant for maintaining an acceptable noise level in residential or business settings.
Acoustic Barriers: Acoustic barriers, such as walls or screens made from dense materials, block sound waves from reaching other areas. These barriers work effectively in industrial environments where motors are close to workspaces. The British Standards Institution notes that proper acoustic barriers can block up to 20 dB of noise.
Damping Materials: Damping materials are applied to the motor or its mountings to reduce vibration and resonance. Materials like viscoelastic compounds can transform vibrational energy into heat, thereby decreasing noise levels. According to the Journal of Acoustic Engineering, employing damping can reduce noise by as much as 10-15 dB in some cases.
Massive Foundation: Constructing a massive foundation for the motor helps in reducing noise transmission. The significance of mass lies in its ability to absorb sound energy. Research from the International Journal of Environmental Science reveals that a properly designed foundation can lead to substantial reductions in noise transfer, improving noise control.

Together, these isolation techniques provide effective strategies to manage AC motor noise in various environments, thus enhancing both comfort and operational efficiency.

What Products Are Available to Reduce AC Motor Noise in My Audio?

To reduce AC motor noise in your audio, several products are available. These products can help minimize unwanted sound, enhancing your audio experience.

Acoustic Foam Panels
Motor Isolation Pads
Soundproof Enclosures
Active Noise Cancellation Devices
Anti-vibration Mounts
Ground Loop Isolators
High-Quality Power Conditioners

Understanding the range of products can help you make an informed choice about reducing AC motor noise. Below are detailed explanations for each option.

Acoustic Foam Panels:
Acoustic foam panels absorb sound waves and minimize reflections. These panels work by reducing the echo in a room, which can enhance audio clarity. According to Sound on Sound (2020), using these panels can lower background noise levels significantly, providing a more professional sound environment.
Motor Isolation Pads:
Motor isolation pads are designed to reduce vibrations transferred from the motor to the surface it sits on. This product effectively dampens the noise created by motor operation. A study from the Journal of Sound and Vibration (2019) demonstrated that using isolation pads can decrease noise levels by up to 80%.
Soundproof Enclosures:
Soundproof enclosures can house AC motors to contain noise. These enclosures are constructed from sound-dampening materials. They can significantly decrease noise emissions by trapping sound within the enclosure. Acoustic Engineering studies show that these solutions can achieve noise reduction by 10-20 decibels.
Active Noise Cancellation Devices:
Active noise cancellation (ANC) devices use technology to cancel out unwanted sounds through sound wave interference. These devices work well in combination with traditional noise reduction methods. According to research published in the Journal of Audio Engineering (2021), ANC can effectively reduce noticeable noise in settings that include AC motors.
Anti-vibration Mounts:
Anti-vibration mounts help to isolate motors from surfaces that transmit vibrations. They are particularly effective in preventing noise caused by motor resonance. A survey by the American Institute of Physics found that the use of anti-vibration mounts can decrease motor-induced noise by approximately 30%.
Ground Loop Isolators:
Ground loop isolators prevent audio hum caused by ground loops in electrical systems. They ensure clean audio by breaking the ground connection between devices. The Audio Engineering Society indicates that using these isolators can resolve common noise issues without disrupting system performance.
High-Quality Power Conditioners:
High-quality power conditioners filter out electrical noise from power sources. They provide clean power to audio equipment, enhancing overall sound quality. According to the National Institute of Standards and Technology, power conditioners can reduce electrical interference, which in turn can diminish noise from AC motors within audio systems.

By exploring these products, you can effectively reduce AC motor noise and improve the quality of your audio experience.

How Can I Prevent AC Motor Noise from Affecting My Audio in the Future?

To prevent AC motor noise from affecting your audio, you can implement noise isolation, use filtering devices, maintain proper grounding, and ensure equipment placement is optimal.

Noise isolation minimizes vibration transmission and electromagnetic interference. Placing the AC motor on a dedicated base decouples it from other equipment. Using vibration-dampening mounts can further reduce noise. Acoustic panels can also absorb sound waves, lowering the overall noise level in the environment.

Filtering devices eliminate unwanted electrical noise. Power line filters are effective as they block high-frequency noise from entering your audio system. According to a study by Khusainov and Murtazaeva (2022), using high-quality line filters can reduce noise levels by up to 50%. These filters can be integrated into your power supply system for optimal performance.

Proper grounding is essential in minimizing electrical noise. Connections should be secure and reliable. Using a dedicated ground for your audio equipment can prevent hum caused by faulty or shared grounding paths. A study by Watanabe et al. (2020) found that proper grounding techniques could reduce noise interference significantly in audio systems.

Optimal equipment placement reduces the risk of noise interference. Keeping audio gear away from AC motors and power lines reduces the chance of electromagnetic interference. Ensuring adequate spacing between audio gear and the motor helps maintain audio clarity. The American Society of Interior Designers suggests maintaining at least three feet of distance between sensitive audio equipment and AC motors to minimize noise issues.

By applying these techniques, you can significantly reduce the impact of AC motor noise on your audio experience.

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AC Motor Noise in My Audio: Causes, Common Types, and Elimination Techniques