A New Generation of Condenser Measurement Microphones

Environmental Influences on Microphones and Sound Calibrators

“…Both the air density and the speed of sound, and therefore the compliance of the back cavity, depend on humidity, but the effect is an order of magnitude smaller than temperature. For example a 30% change in humidity is equivalent in magnitude to only one degree Celsius 3 .…”

Calibration and Measurement in Underwater Acoustics 2003

“…Consequently, the measurements are performed in an area where interference between the direct acoustic signal and that reflected from the body of the hydrophone and its support can cause distortion of the acoustic field. If the standard calibration procedure is used it will lead to large uncertainty of the results [2].…”

Silicon microphones - a Danish perspective

“…There is one internationally standardized design for precision measurement microphones, which was invented several decades ago [11]. The design is based on the parallel plate capacitive detection principle, see figure 1.…”