System against external noise can improve the experience of listening to music on the headphone.
When buying a headphone it is common to be in doubt as to the power, design and even the price of the product.However, other important details can be left out at the time of purchase.This is the case of noise cancellation, a system that can block part – or almost everything – of sounds external to the handset.The function is interesting by directly influencing the audio quality.
Sound cleaner: see the best noise canceling headphones
With a handset that offers noise cancellation you can listen to music at lower volume and not lose in sound quality.After all, interference from external noise is less, which can make the audio cleaner and even protect users’ ears.Despite the advantages that the system brings, it is not always so simple to identify which handset to buy based on the function.
To help you choose a new headphone, understand how the noise canceling system works, as this can improve the quality of the songs and, of course, how technology can influence the price of accessories.
Control of passive noise or active system?
The first step in understanding how noise canceling on headphones works is knowing the difference between the types of external noise control: the passive and the active system.Passive noise cancellation is the simplest (and inexpensive), based on the use of materials with better acoustics, which hinder the entry of external sounds, such as special foams, leather and shell of thicker material.
The use of these elements with a focus on sound protection ensures a superior quality compared to ordinary headphones, which can not always prevent day-to-day noise from interfering with music playback, for example.Because they have a simpler external noise system, passive headphones are not as effective as accessories that have active cancellation.
Still, headphones with passive noise cancellation have the advantage of more affordable prices.It’s possible to buy a headset with the function from $ 60, such as the Philips Plush Comfort SHP2000, and the Sony MDR-ZX110, which are not specialized in blocking noise, but end up showing good isolation Sonorous, precisely because of the materials chosen.
Active noise cancellation is much more complex than the other, by combining the use of sound insulation materials with hardware to block virtually external noise.Basically, the system digitally aborts the sound waves that pass through the headset‘s shell.
The control does this by creating waves in the opposite direction and of the same amplitude as those of external sounds.For example, if the noise is a positive wave, the handset can generate a negative wave of the same size that cancels the sound of the other.The result of this is the silence that comes out of the loudspeakers, without disturbing the reproduction of music.
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For these headphones to be able to generate identical frequencies and cancel out external noise, manufacturers need to invest in more advanced technology than that found in passive isolation headphones. This more sophisticated system, of course, has an influence on the price of headphones. As a result, it is not common to find a handset with active noise control for less than $ 300. One of the cheapest examples in the category is the Sony MDR-NC31EM, which has DNC ( Digital Noise Canceling) technology and costs about R $ 340.
In highly silent environments, perhaps the difference in sound quality between a common headphone and a noise-canceling one is not so great.However, in public transportation and other noisy places, investing in an accessory with the technology can be very worthwhile.Sounds can therefore be cleaner and there is no need to listen to music at very high volumes.
The advantage of buying a headphone with sound insulation depends on the needs of the consumer.Anyone who spends a lot of time at home or in the library may not need so much of a product with the feature.Those who prefer to take the phone to the street may have benefits with a product that cancels external noise.This is especially true for those who need concentration in noisy environments.
The price of headphones in some cases can go up with the insulation technology.Still, it is possible to pan models like the Sony MDR-ZX100, which can be found in online stores for less than $ 70.
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