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
2008年1月2日 星期三
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