A study on the frequency characteristic of a probe microphone and its adaptive control.

Abstract

It is difficult to measure sound in the narrow space, such as places about the complicated machine and the complicated object, by a usual microphone. Therefore, a probe microphone is used instead of a usual microphone. But the frequency characteristic of a probe microphone is not uniform and unknown by the experimental data. In this research, at first, the frequency characteristic of a probe microphone was theoretically analyzed with respect to the size of probe etc.. Next, we proposed the system of a probe microphone with the reverse filter for the improvement. As a result of this simulation, the reverse filter is available.