In a loud, noisy world that’s greatly dependent on technology in all aspects of life, complaining about noise pollution and trying to do something about it is to be expected.
One of the advances in this regard is employing the technology of CVC noise cancellation. This technology has enabled people to do things (while being surrounded by loud noises) they weren’t able to before.
For example, it’s possible now to be in a full-blown party and still conduct a clear, audible phone call. However, this technology is relatively new to many people and thus we’ve decided to put together a complete guide about CVC noise cancellation, what it’s and how it had started, what it’s good for, and what makes it necessary.
What is CVC noise cancellation?
CVC is the abbreviation of the technical term “clear voice-capture”. When someone, for example, is making a phone call using ear-buds that utilize this technology, noises other than their own sound will be dampened, and the microphone will only carry the speaker’s sound to the other end of the call.
How does CVC noise cancellation technology work?
- Sound is a P-wave that forms a changing pattern of rarefactions and compressions causing vibrations in the air.
- The CVC noise cancellation device intercepts that pattern of rarefactions and compressions and interferes with it to cancel the noise.
- With the adaptive algorithms in the device’s program, this technology analyzes the surrounding noises countering the pattern with another of the opposite effect leading to the cancellation of noise as a result.
- The new noise pattern is called destructive interference in the sense that it destroys sounds leaving only the sound waves produced by the speaker.
- Applying CVC noise cancellation technology can be either one-dimensional or three-dimensional. So far, one-dimensional applications are easier and more common.
- One-dimensional CVC noise cancellation is easier because it focuses on clarifying the voice of one speaker only. Carrying the voices of multiple speakers is much more difficult, and therefore rarely applied.
- Applications of this technology include noise cancellation ear-buds and headphones, anti-snoring apps and devices, noise-cancelling mufflers, certain sound hardware (such as those used in music studios), equipment built for deafening sounds in air conditioning ducts, and anti-snoring devices.
With how technology develops, CVC noise cancellation improves with every new version. The most commonly used versions of it now are 6.0 and 8.0.
CVC 6.0 and CVC 8.0
- Both versions utilize algorithm sets that cancel noise. Both are embedded in Bluetooth headphones’ microphones.
- CVC 8.0 is efficient at canceling the smallest of noises via algorithms that are better at recognizing foreign noises and are more complex and advanced than those in CVC 6.0.
- Calls in headphones and ear-buds with CVC 8.0 audio-processing circuits are better than CVC 6.0 at conducting phone calls and online conferences in terms of clarity and audibility.
- Both versions of CVC support the latest Bluetooth headsets and are good at preserving power.
So, now that we’ve learned a bit about what CVC noise-cancellation means and how it works, it is time to learn a few things about how it had started.
History of CVC noise cancellation:
Considering electronics, CVC noise cancellation is relatively old. In 1936, Paul Lueg won a patent for discovering how to dampen noises in ducts by intercepting sound waves and canceling arbitrary ones.
In 1950, Lawrence J. Fogel managed to employ noise cancellation to dampen noises in the cockpits of aircraft.
In 1957, Willard Meeker built a design of noise cancelling earmuffs that covered up to 500 Hz in bandwidth with the ability to attenuate sounds to 20 dB.
In 1986, Jeana and Rutan designed prototype headphones to lessen exposure to loud noise in their flight around the world.
About twenty years ago, Nissan developed the first vehicle with a noise cancellation system embedded. Even though the CVC technology was still at an early stage at the time, it’s still relatively close to the CVC noise cancellation technology we have nowadays.
Now, a good number of people would find interest in noise cancellation technology overrated. After all, what could a bit of noise, albeit loud, do? However, a growing number of scientific studies prove that long continuous exposure to noise can be extremely harmful. However, some professions require people to work surrounded by noise. Therefore, they should make use of voice cancellation technology or they would risk some of the following problems:
- Cardiovascular diseases:
loud noises cause disturbance to listeners prompting their hearts to beat erratically which may lead to high blood pressure, arrhythmias, heart attack risk, and increased levels of adrenaline and cortisol.
- Hearing problems:
it goes without saying. Loud continuous noises can lead to hearing impairment. A noise cancellation technology is a must for people who are around places such as railway stations or football stadiums for long periods of time.
- Poorer sleep quality:
Noise negatively affects humans’ sleep quality. That is a given fact. It does not take many nights of poor sleep for human’s biological functions to fail. With poor sleep due to continuous noise, stress builds up quickly and serious health issues start happening.
- Poorer cognitive abilities and behavior:
There is an idiom for that: “I can’t hear myself think”. Noise does negatively affect thinking processes, attention span, long-term and short-term memory, concentration, and overall behavior.
CVC noise cancellation provides users with a number of features and qualities that can benefit them, such as:
- CVC noise cancelation utilizes auxiliary stream mixing, nonlinear processing, frequency improvement in speech clarity, equalizers for sending and receiving, comfort noise, power saving, auto gain features, howling control, and adaptive equalizers with embedded artificial intelligence technology.
- When utilizing CVC noise cancellation technology, noise can drop to 30 dB.
- Ambient noise around the speaker using this technology is subdued before reaching a listener.
- Much better sound quality and noise-free calls.
To conclude, a Bluetooth headset with CVC noise cancellation technology is definitely money well spent. There are a number of good brands to choose from in that regard, such as the Mpow series, the Gorsun M98 headphones, and the Ambar EPCC-07 Bluetooth Headset V4.2 among others.