I have found a way to get rid of that popping sound in your speakers.
1. Obtain a copy of "AppleHDA.kext" from a 10.4.9 Intel installation, or use Pacifist to extract it from a 10.4.9 upgrade package. This is the High Definition Audio extension file.
2. You will need to download the .dmg file and open it to extract the .pkg file to the desktop and run Pacifist against it to extract the file. The file is in the same place as it is on the machines.
3. "/System/Library/Extensions/" is where AppleHDA.kext lives in the .pkg and on the computers.
4. Go to /System/Library/Extensions and delete the AppleHDA.kext file from your 10.4.10 installation.
5. Copy the newly obtained AppleHDA.kext into /System/Library Extensions on your affected computer.
6. Open the Terminal and type: sudo touch /System/Library/Extensions to rebuild the kext cache.
7. You may be asked for your admin password to do this.
8. Reboot the machine and the popping sound will be history.