In the control signal path, the dbx Type II process rolls off the high and low frequency response to desensitize the system to frequency response errors since the roll-off is " only " in the control path, it does " not " affect the audible sound.
12.
A technique for obtaining an estimate of the glottal volume velocity waveform during voiced speech is the "' inverse-filtering "'of either the radiated acoustic waveform, as measured by a microphone having a good low frequency response, or the volume velocity at the mouth, as measured by a pneumotachograph at the mouth having a linear response, little speech distortion, and a response time of under approximately 1 / 2 ms.
13.
As a rule, transmission line speakers tend to have exceptionally high fidelity low frequency response far below that of a typical speaker or subwoofer, reaching into the infrasonic range ( British company TDL's studio monitor range from the 1990s quoted their frequency responses as starting from as low as 17 Hz depending upon model with a sensitivity of 87 dB for 1 W @ 1 metre ), without the need for a separate enclosure or driver . are less sensitive to positioning, and tend to create a very spacious soundstage.
