My MacBook's internal microphone input level is too low since update
Since I update my system to 10.4.7 or 10.4.8, the input level of my MacBook's internal microphone is way too low. I have to set the input volume to at least 50 % to see any slight input level. And if I max the input volume, the volume level goes up to 25 % with normal speaking. If I speak very loud, the volume level will sometimes go up to 50 %.
Altogether it's very annoying. iChat, which I use nearly every day, is now actually unusable. I can't scream into the micro at work after all. I recorded my voice with GarageBand as a second test, and the result was just a faint whisper, too.
Exactly the same is also true for my girlfriend's MacBook: Never any problems with the microphone, and now the input level has dropped down. My brother's MacBook in contrast has no microphone problems at all.
I would appreciate any help or tips... Thanks in advance.
Henry
MacBook Mac OS X (10.4.8)