Instructions
Bluetooth Headset With Microphone
Go to the "Settings" icon on the PS3 menu. Scroll down and select "Accessory Settings." Scroll down again and select "Manage Bluetooth Devices." Select "Yes" on the register new Bluetooth device prompt.
Select "Register New Device" and press the "X" button. Press the "Pair" or similarly titled button on the Bluetooth headset. Select "Start Scanning" on the PS3. Then select the name of the Bluetooth headset on screen. Use the on-screen keyboard to enter the passkey, which is 0000 by default on most Bluetooth headsets.
Select the "OK" button. On the Register Complete screen, press the "X" button. Go to the "Settings" icon on the PS3 menu. Scroll down and select "Accessory Settings," then "Audio Device Settings." Select "Input Device" and then select the name of the Bluetooth headset. The PS3 automatically will assign the headset as the input and output device.
Speak into the microphone, and adjust the outgoing volume by pressing the "X" button. The outgoing volume is what other players will hear when you speak. When you're satisfied, select the "OK" button.
USB Headset With Microphone
Connect the USB headset to either USB port on the front of the PS3.
Go to the "Settings" icon on the PS3 menu. Scroll down and select "Accessory Settings." Select "Audio Device Settings." Select "Input Device" and then the name of the USB headset. The PS3 automatically will assign the headset as the input and output device.
Speak into the microphone, and adjust the outgoing volume by pressing the "X" button. When you're satisfied, select the "OK" button.