hello everyone
i want to know how to connect DAC to sound sensor i knew that i must put attenuator and low pass filter before that sound sensor please i want any details and the hierarchy of the blocks
thanks

 

I am going to guess you mean speaker for "sound sensor". A speaker is meant to make sound. A sensor responds to it.

A DAC usually has a low output. It needs to be low pass filtered and then amplified before you get sound out of a speaker.

Blocks go like:

1. DAC
2. Low pass filter
3. Attenuator (volume control)
4. Amplifier
5. Speaker

 

thanks alot but why we use amplifier after attenuator ana i knew that the speaker receives asmall signal in the mv range?

 

Amplifier goes after attenuator because otherwise the amplifier would have to be more powerful and then waste a lot of the power in the attenuator.
Headphones may be in the mV range but loudspeakers may require 10s of volts.
Can I just check if you are trying to output a sound or to measure one - you mention DAC and sensor which are contradictory.