What is Noise Cancelling Technology?

7 Sep
2018

 
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Audio hindrances are categorized into two main categories, that is, noise and distortions. Noise is generally the additional signal that decreases the quality of useful signal. Furthermore, distortion changes everything from the original signal. Some types of distortions completely destroy the useful information and cannot be restored. To deal with such kinds of problems, the concept of noise cancelling technology is introduced. Also, the interference of such noises in headphones are reduced by using the active noise controlling method. These methods use attenuators to reduce the noisy signal by amplifying the real voice signal. Moreover, they are used in microphones and headphones.

There are two broad types of noise cancellation technology. Out of this, one uses mics to communicate with the other end. For instance, in a nutshell, type of headphone, the digital algorithm is used to eliminate the surrounding noise and deliver only the voice signal to the end user. Furthermore, the second type of noise cancelling is used in headphones that are designed specifically to protect the user from the disturbed environmental noise.

How do Headphones Achieve Noise Cancelling?

Major headphones use active and passive type of noise cancellation for their reliable operation. The active noise cancelling uses more advanced features, such as aural overlap and destructive interference, to target and attenuate background noise. These active type methods simply build a mirror sound signal that helps to reduce the level of noise drastically. This is also majorly used for steady and low-frequency sound applications.

Moreover, the passive noise cancellation in headphones is achieved by designing headsets with different physical features, such as material used and construction of wearing. This modification results in blocking sound waves to some extent of about 15 to 20 decibels (DB). These kinds of passive noise-canceling headphones are specially built by dropping out ambient noise to focus more on someone’s talking and music. Thus, such kind of passive noise cancellation headphones are best for filtering out irregular, external, and high-frequency sounds that helps to achieve qualitative sound by preventing noise or distorted signals. Nevertheless, maximum effectiveness in noise is attained by combining active and passive noise cancellation.

What’s inside the Noise Cancelling Headphones?

Batteries - The noise-canceling electronics equipment is battery-powered.

Microphone - These are mounted on the ear cup and used to receive external sound waves that are ambient in nature, which originate from the traffic, crowd, machinery, and others.

Noise-Cancelling Circuitry - These circuitry analyses the disturbed noise and uses this information to create a sound wave that counteracts it. The new sound wave generated by this circuitry is exactly 180 degrees out of phase for cancelling out the noise signal. Electronics in the earpiece create a noise-cancelling wave that is the exact opposite to the ambient noise captured by the microphone. This wave acts similar to a noise eraser: it cancels out the unwanted sounds without falling back on the primary playback audio.

Speaker - This speaker receives the newly creates sound waves and plays them into the ear buds.

New Approaches for Noise Cancelling Headphones

The mobile phone plays an important and vital role in modern day-to-day life. The new age headphones, such as Sony, JBL Everest elite, AKG, tribit xfree, and others, have been boosting the growth of the market. Increase in the adoption of smartphones, as they offer effective connectivity to the digital world, majorly drives the market. Rise in demand for wireless accessories also boosts the market growth. This increase in demand is attributed to the change in customer preferences to listen to music on portable devices, such as smartphones and tablets.

According to a recent report published by Allied Market Research, titled, Mobile Phone Accessories Market, this market was valued at $217,278 million in 2016, and is projected to reach at $255,149 million by 2023, growing at a CAGR of 2.3% from 2017 to 2023.

 
Alex Hillsberg

Alex Hillsberg

Chief editor of review team at FinancesOnline

Chief editor of review team at FinancesOnline Alex Hillsberg is an expert in the area of B2B and SaaS related products. He has worked for several B2B startups in the past and gathered a lot of first hand knowledge about the industry during that time.

 
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