Electronman
New Member
Hello,
Several days ago Ron and audioguru suggest me the below electret mic amplifier.
I have used to change the values and see the results so the second pic with green marks is my modification.
I operated the circuit with a 9V battery and used a headset at its output.
The result after modification was very amazing.
The mic can detect every small noise. I was so amazed when I operated it. I could hear my heartbeat too.
Now does everybody have any idea if I can make this circuit more sensitive somehow? Maybe I use it as a directional espionage microphone (Sorry do not know what do you call them)?
Besides, I have a satellite dish (the radius is 90cm), do you guys know how many distant I can detect with it?
How many distant the commercial ones can detct?
Thanks.
Several days ago Ron and audioguru suggest me the below electret mic amplifier.
I have used to change the values and see the results so the second pic with green marks is my modification.
I operated the circuit with a 9V battery and used a headset at its output.
The result after modification was very amazing.
The mic can detect every small noise. I was so amazed when I operated it. I could hear my heartbeat too.
Now does everybody have any idea if I can make this circuit more sensitive somehow? Maybe I use it as a directional espionage microphone (Sorry do not know what do you call them)?
Besides, I have a satellite dish (the radius is 90cm), do you guys know how many distant I can detect with it?
How many distant the commercial ones can detct?
Thanks.