Microphone - transistor switching on a led

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To use a microphone to switch a transistor for lighting an LED, it's essential to select a microphone that can produce sufficient voltage to activate the transistor. A common choice is an electret microphone, which typically outputs around 0.5 to 1 volt. The transistor should be a low-saturation type, such as a BC547, suitable for low-voltage applications. The circuit will operate at a fixed supply voltage of 3.8V, which is compatible with the components discussed. Proper configuration will ensure that sound detected by the microphone effectively turns on the transistor and lights the LED.
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hi i want to use a microphone connected to the base of a transistor.yhe transistor should work as a switch . it should turn on with a sound to the micro phone. does anyone know what voltage the mic can produce?what kind of microphone do i need and what kind of transistor?the circuit is designed to light up a led. The voltage supply of the circuit, probably fixed to the collector of the cicrcuit is 3,8v.thank you
 
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