Active Noise Control (ANC) is a sophisticated technology that reduces unwanted sound through the use of electronic systems. It involves creating a secondary sound wave that is precisely the inverse of the unwanted noise, leading to their cancellation.
- Microphones: ANC systems use microphones to detect ambient noise. These microphones can be external (picking up environmental sounds) or internal (picking up what the listener hears).
- Electronic Circuitry: The heart of ANC technology lies in its electronic processing unit. This unit analyzes the incoming sound and generates an anti-noise signal.
- Speakers: The generated anti-noise signal is played through speakers, where it meets the original noise, leading to noise cancellation through destructive interference.
- Noise-Cancelling Headphones: According to a study by Global Market Insights, the noise-cancelling headphones market size exceeded USD 5 billion in 2019 and is expected to grow significantly. These headphones are particularly effective against low-frequency noise, like the hum of an airplane engine.
- Automotive ANC Systems: Modern cars integrate ANC to reduce engine and road noise. For instance, Honda's Accord and Acura models use ANC to enhance cabin quietness, improving driver and passenger comfort.
- Targeted Noise Cancellation: ANC is more effective against low-frequency noise, which is typically hard to manage with passive methods.
- Space-Saving: ANC systems take up less space than bulky sound-absorbing materials used in passive noise control.
- Adaptive Noise Cancellation: ANC can adapt to changing noise environments, maintaining effectiveness over time.
- Cost: ANC systems are generally more expensive than passive noise control solutions. The advanced technology and electronic components contribute to the higher cost.
- Durability: The electronic components in ANC systems can be more prone to wear and tear compared to the more robust materials used in passive noise control.
- Energy Consumption: ANC systems require a power source, which can be a drawback in terms of energy efficiency and sustainability.
- Frequency Limitations: ANC is less effective at higher frequencies, where the wavelength of sound becomes shorter, making it challenging to achieve precise cancellation.
Active Noise Control represents a significant advancement in noise reduction technology. Its ability to effectively cancel low-frequency noise makes it a desirable solution in many scenarios, despite its higher cost and energy requirements. As technology advances, we can expect improvements in cost-efficiency, durability, and frequency range effectiveness, further enhancing the appeal of ANC systems.
Credit: Taken with the help of chatgpt-4.
Senior Power BI Developer at Infosys (Germany), DAX, SQL
1 年Keep it up good work Nitish Katiyar