Bruel and Kjaer 4944 Microphone Grid Frequency Response Function System Identification

[摘要] Br el & Kjaer (B&K) 4944B pressure field microphone was judiciously selected to measure acoustic environments, 400Hz 50kHz, in close proximity of the nozzle during multiple firings of solid propellant rocket motors. It is well known that protective grids can affect the frequency response of microphones. B&K recommends operation of the B&K 4944B without a protective grid when recording measurements above 10 to 15 kHz.

[发布日期] 2010-04-19

[学科分类] 声学和超声波