Skf bearing measurement microphone Introduction

 Measuring instruments Precision bearing noise. King microphone for measuring the channel indispensable components, the sound pressure will change with the corresponding change in the voltage. Microphone should have a uniform frequency characteristic; sufficient sensitivity and stability, and is independent of temperature, atmospheric pressure and the time of use; the entire dynamic range of the measured channel low inherent noise, nonlinear distortion. Awarded the same mark dirty (t'ocTl 37N-73) provides for the measurement microphone with 56 technical requirements.

     To test was, capacitor type can be used and electric microphone. Piezoelectric microphone, since the frequency characteristic is not satisfactory, are rarely used measuring instruments bearing noise.

     -Capacitor microphone characteristics of the channel for a long time, but they need a list given anode polarization voltage increases and the sound source. These have limited their application in production. In order acoustic instrumentation power capacitor microphone towel, you can use MR-5, MUI (-6 skin and sound transmission type "cloth to stay with Katsuya Seoul" the company's microphone.

     Electric power microphone with the most, the frequency characteristic unevenness of less than t 3 and t 4 dB case it po working frequency range is very wide, its noise level is very small team of linear distortion.