karthikeid
- Dec 7, 2008
- 94
- Joined
- Dec 7, 2008
- Messages
- 94
hi
how test a condenser mic ???
how test a condenser mic ???
audioguru2
- Apr 6, 2004
- 12,026
- Joined
- Apr 6, 2004
- Messages
- 12,026
A condenser mic needs a 48V power supply.
An electret mic is similar but has a 48V charge built-in.
The electret mic has a FET transistor impedance converter that must be powered by about 0.5mA from a resistor connected to a few volts.
The output level is about 10mV if you talk in a normal volume about 20cm from the mic.
So a mic preamp circuit is needed.
Here is an electret mic with a preamp:
View attachment 40627
An electret mic is similar but has a 48V charge built-in.
The electret mic has a FET transistor impedance converter that must be powered by about 0.5mA from a resistor connected to a few volts.
The output level is about 10mV if you talk in a normal volume about 20cm from the mic.
So a mic preamp circuit is needed.
Here is an electret mic with a preamp:
View attachment 40627
Similar threads
