bigshot
Headphoneus Supremus
Well I tried one, the one I have is the AT ANC-7b see below:Knowing that to the human ear, 10dB difference translate to twice as loud, 15dB of noise reduction should be a quite significant difference
For speech, the most important range is going to be 1 to 6kHz or so. But my guess is that noise cancelling is going to depend more on the noise being a sustained tone rather than broken up pitter patter than it is frequency.
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