Baha® 4 Sound Processor

This section will show you how to operate your Cochlear™ Baha® 4 Sound Processor, how to make adjustments to settings and programs, and what to consider if you are a parent, teacher or caregiver to someone with a Baha 4 Sound Processor.

Baha user Agnes


Baha 4 Sound Processor features

1. Battery compartment door
2. Direct Audio Input (DAI)
3. Microphones
4. Volume up/down & Power on/off button*

5. Plastic snap connector
6. Program button & Wireless audio streaming button
7. Volume up/down & Power on/off button*
8. Attachment point for the safety line

* If the sound processor is worn on your right side, button 4 = Power On and Volume up. Button 7 = Power Off and Volume down.

If the sound processor is worn on your left side, button 7 = Power On and Volume up. Button 4 = Power Off and Volume down.

Turning your sound processor on and off

Your hearing care professional has programmed your sound processor to be used specifically on the right or left side of your head (images show sound processor on right side). When the sound processor is attached, the front button is power on and the rear button is power off.

Turn your sound processor on by pressing and releasing the Power on button (4 if worn on right side, 7 if worn on left side). To turn your sound processor off, press and hold the Power off button (7 if worn on right side, 4 if worn on left side) down for 2 seconds. When your sound processor is turned back on, it will return to the default setting (program one).

Cleaning the sound processor

Baha sound processor cleaning wipes

Clean the sound processor’s housing using a sound processor cleaning wipe. Do not use water to clean your sound processor.

Baha sound processor cleaning

Brush the snap coupling clean using the soft sound processor cleaning brush. Avoid using excessive force on the snap coupling as this could damage the processor.

Baha Safety line

Baha Safety line

When taking part in activities where you risk losing your sound processor we recommend using the safety line provided. Insert the line into the attachment point and fasten it to your clothing.

Note: The safety line should always be used when a Baha sound processor is worn by children.


Please seek advice from your health professional about treatments for hearing loss. Outcomes may vary, and your health professional will advise you about the factors which could affect your outcome. Always read the instructions for use. Not all products are available in all countries. Please contact your local Cochlear representative for product information.