Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition

5.3. Combination of pressure and pressure-gradient microphones

A combination of pressure and pressure-gradient microphones is one that responds to both the pressure and the pressure gradient in a wave. A common example of such a microphone is the one having a cavity at the back side of the diaphragm that has an opening to the outside air containing an acoustic resistance (see Fig. 5.7a).

Figure 5.7 (a) Sketch of a combination pressure and pressure-gradient microphone consisting of a right enclosure in one side of which is a movable diaphragm connected to a transducing element and in another side of which is an opening with an acoustic ...