2007年10月11日 星期四

Is the more sensitive microphone the better? 麥克風的靈敏度愈高愈好嗎?

The sensitivity of the microphone is one of the most important factors, which affects the receiving result. The higher the sensitivity is, the higher the SPL can be received.Different from the production process of other products, the microphone is selected and sorted by its sensitivity after producing. We cannot get 1000pcs of what we need in sensitivity from just inputting 1000pcs of microphones’ material on the production line. Therefore, in order to avoid discontinuing the production, we had better choose the spec. usually with the sensitivity of -40 to -44, which is popular and easily produced.About the volume, we can still improve it by modifying the circuit, such as the impedance, the voltage, and the amplification factor.We suggest that do not choose a special spec. with very high or low sensitivity at first, or the problem of lead time and lacking of material might happen.
麥克風的靈敏度是影響到收音效果的重要因素之一,靈敏度愈高,所能收到的音量也說愈大,
但因為麥克風的在生產完之後,再根據實際的靈敏度值加以挑選分類,
並不是投料1000pcs就能做出1000pcs所想要的靈敏度,而會呈現常態的分布,
故最好挑選一般常用,好生產的靈敏度,如-40到-44,在大量使用時,比較不會有斷貨的可能,
而最後的音量問題,仍可藉由線路上的修改,如電阻的大小,電壓大小,放大倍率...來解決,
千萬不要一開始就挑選特別高或特別低的麥克風規格,以免陷入交期交,或缺料的問題中.