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Topic: Sound comparison (Read 3 times) previous topic - next topic


Can anybody help me on developing a sensor instrument that can differentiate a dull ( hollow sound ) and a solid sound of a material  when we light knock on it.. Right now i'm using piezeo speaker as the analog sensor...Before start ,I will test (light knock) on a good sample materials ( solid sound ) to record as the reference sound..  It can detect the sound but it cannot differentiate the sound.. is it due to the programming or what? :smiley-roll-sweat:


okay.. i have remove other topic...


Right now it can only detects patterns of knocks and illuminate the green LED it if the pattern is correct. I don't want to detect pattern...
I'm trying to compare sound.. can someone help me?

WilliamK Govinda

Maybe share some of the code you got so far?



just because I'm tired of seeing this question pop up with no movement:

That's about the best you are going to get.

Sparkfun sells the msgeq7.

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