Plecto
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Hi. I'm making a sound level alarm, a simple device that will turn on a light if the sound level is above a certain level. For this I would like it to have the ability to be really sensitive, but I'm not sure how to achieve that. Right now I'm using one of those cheap through hole electret mics with an LMV358 op-amp, but there's a limit to how much gain I can have before noise becomes a serious issue. Perhaps I can increase the gain if I go for a really low noise op-amp, but what can I really expect from one of these electret mics anyway? Any ideas?