Test condition makes the impact on the sensitivity of microphone 測試條件對麥克風靈敏度的影響

Generally speaking, the sensitivity of the microphone will increase when we raise the impedance at 2.2K of RL, the results as the graph 1 & 2.
The sensitivity also rises if we give higher voltage to the microphone, graph 3 & 4.
一般而言,在RL的2.2K阻抗加大,麥克風的靈敏度會變高,結果如圖一二,
V+給麥克風的電壓愈高,麥克風的靈敏度也會變高,如圖三四,


RL 2K =>3K ohm

RL 2.2K => 1.0Kohm










Voltage 2V=>4.5V










Voltage 2V=> 1.2V











Equipment : B&K 2012 + B&K 4227
Microphone : 6.0mm x 2.7mm -42+/-3 dB