I'm trying to use these headphones in a room with lots of hvac noise. In addition to an elevated noise level (between 60-70dB), the noise modulates in pitch and volume over very short timescales, ~1-2s, as best as I can tell. This means that even with the headphones in and on, I can hear the modulation. I guess my questions are 1) should this be happening, and 2) what is the approximate response time of the internal electronics once the mic picks up the sound has changed? Maybe if I know how fast the cancelation is supposed to respond, I can have some information to give the hvac technicians to narrow down what the problem is so they can fix it.
By response time, do you mean the time it takes the noise-cancelling to be processed? If so, the answer is immediately.
As a general recommendation, it is best to use the larger ear-tips as to create a better seal around the ear canal. DO NOT insert the tips inside your ear canal; rather, they should be resting just outside the ear canal, enough to create a seal around the outside of your ear canal.
It’s also important to note that ANY set of noise-cancelling headphones will not simulate deafness (as to cancel out all [background] noise/sound); they cancel out frequencies commonly associated with being “noisy”, which is more-so the lower-end/bass frequencies. Listing to music while noise-cancelling is enabled will also help to mask-out most other outside sounds. So much so, that you will not be able to hear most outside sounds, even with music played at lower levels. Therefore, it is possible to notice some background sounds (including some higher-frequency content of the human voice), but the noise related to those sounds will be greatly reduced.
Over-The-Ear Noise-Cancelling headphones (such as the ATH-ANC9 or ATH-ANC7b) might be more beneficial, because they provide better active noise-cancelling through it’s internal circuitry, as well as greater passive noise reduction (the physical ear-cups blocking sounds from entering).
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2 months ago