Sound activated LED

Hi, need help with my electronics project. I would like to light up a set of LED's (about 20) in response to a microphone input using a 9V battery source. I have searched the internet for schematics but no luck. I only found LED's thatlight up at certian frequencies or light up depending on volume. All I need is to light up 20 LED's whenever a sound is detected on the microphone! Please help!

So...What is the difference between
"Sound activated LED about 20 LEDs"
and
"LED's thatlight up depending on volume"?

Do you want all 20 LEDs to be off with no sound and all 20 LEDs to be on with any sound?

Yes, exactly. if I talk, all the LED's light up. As simple as that.