Technological advances in the field of passive and active noise reduction headphones and headphones are growing. Thanks to these small instruments it is now possible to isolate yourself from this noisy world to quietly listen to your music, like working in open space without constraints.
The Noise Canceling is a major technological breakthrough of recent years that has been used in many areas, and one that interests us most is that of audio. In this post, we will first focus on defining the active / passive noise reduction, then on showing the advantages and disadvantages of this technology for headphones and earphones and finally we will talk about the effects of these objects. connected anti-noise on our health.
The Noise Canceling, Quezaco ??
The new trend is for passive or active noise reduction headphones and headphones. Let’s study the subject together in more detail.
But what is active noise reduction?
It is the fact of passing a sound wave over another to fill it and get a silence, also called white noise, or pink noise, it is according to. First used in military aviation to protect the ears from unbearable engine noises, it quickly found its usefulness in headphones and earphones.
Why a passive noise reduction?
Used primarily in the working position, it reduces external noises from 20 to 33 decibels, thanks to non-electronic components such as memory foam. French law requires the employer to protect the hearing of its employees in work environments where ambient noise is greater than 85 decibels. For example, SHURE strictly followed the standards with SE215 earphones.
Why active noise reduction?
It allows to fill the outside sound with another to counter the phase and form a bubble around it that will create sound insulation. It is characterized by:
– the presence of microphones to analyze the external sound
– loudspeakers for a corrective signal
– filters in data and in power supplies.
This differentiates it from passive noise reduction. For example BOSE with its wireless headset QuietComfort 35, is a very good example of what is active noise reduction on a headset.
But what are the noise canceling headphones or earphones used for?
Several scientific tests prove it, it is true that noise can cause stress, fatigue and can even deteriorate hearing. Thanks to numerous headphones and audio earphones equipped with a noise reduction, it is now possible to cut off all noise with incredible insulation.
Nowadays few places offer the calm necessary to listen to his music. These revolutionary headphones using noise canceling allow everyone to isolate themselves completely, or almost, from the outside world and enjoy good music quietly.
Block the majority of the sound.
No need for these headphones and earphones to increase the volume of music to be cut off from the surrounding environmental nuisances. The system automatically creates the music / nuisance barrier and you can enjoy your music by working even in the most crowded places.
No more need of sound.
Indeed, it is shown that higher quality music provides a superior listening experience when played with a lower volume and more natural. This allows you to fully enjoy the notes and variations.
Ideal for concentration.
In transport, office, home, etc … It can be difficult to concentrate if there is noise around. This can distract and prevent the use of valuable time to increase productivity. Noise reduction helps to make a “noise barrier” between you and the environment and thus to gain in efficiency.
Targeting also for young people.
The student can often feel difficulty concentrating because he is often in a noisy environment (the review room, we all know the student apartment shared with 4 roommates …). When the headphones or headphones are worn, it is easier to go back into his element and learn without being disturbed by his entourage. It is also possible not to activate its music and simply enjoy the anti-noise function that continues to isolate you from external parasites.
A good quality for a product with anti-noise functionality also has negative characteristics not to neglect. We will see them in detail.
Quality at a high price.
The difference between a passive reduction model and another with these characteristics is that it exceeds the usual budget for headphones considerably. This is explained by a technology on push microphones and a technique by its design that the manufacturer perfects to the maximum. The average price for this acquisition is about 300 € to discover very good audio performance.
Huge consumption of energy.
These headphones or headphones have batteries or a very large battery that can be exhausted faster. For some models, thanks to wired access, it is possible to use the player’s battery (smartphone, tablet, computer …). We therefore have a battery economy of the headphones, but that can make the quality of listening totally different through this channel. For others, wired access does not exist, which makes the full discharge of the battery impossible to use.
Quality and undesirable noise reduction.
Some people may be disturbed by a more metallic sound or light breaths that degrade hearing. The modification is mandatory by these components and can disturb the most audiophile of us. Continuing progress it is now possible to find the alliance of high sound performance with active insulation but at a certain price …
Almost perfect insulation.
If you are looking for complete silence, these products do not yet meet this demand. If the use of filter is valued, some sounds still come to your ears. This is called “punctual” very loud or very sharp noises that come out of the frequencies on which the reduction works. For a majority of users the insulation is sufficient or even greater than the waiting which remains very effective and is perfectly suited to the idea of silence for them.
A different listening comfort.
It can be embarrassing and unsuitable for prolonged listening. The possible sensation of pressure due to the active reduction of the noise may require a time of adaptation. It may be due to the ear cushions of the headphones or to the earbud earpieces that can cause headaches due to the pressure exerted (very low percentage of cases).
What effects on our little ears?
The noise comes from different sources and directions, so the processor and the number of microphones by their special distributions is paramount.
The danger of this against noise is not only due to the volume but also to the quantity,