Phonak Audéo B 312 Accessories & Compatibility Guide | Japebo
If you use a Phonak Audéo B 312, choosing the right accessories (like domes, wax filters, receivers and batteries) makes a big difference for comfort, sound quality and reliability. This guide is made to help you confirm Phonak Audéo B 312 accessory compatibility, understand your options, and pick the correct replacement parts the first time.
What accessories are typically used with Phonak Audéo B 312?
Most day-to-day replacement parts for the Phonak Audéo B 312 fall into a few categories:
Domes (ear tips) – the small silicone tips that sit in the ear canal and affect comfort, retention and sound.
Wax protection (wax filters/guards) – protects the receiver opening from earwax and moisture to prevent weak or distorted sound.
Receivers (speakers) – the part on the wire that delivers sound into the ear; different power levels and lengths exist.
Hearing aid batteries – the Audéo B 312 uses size 312 batteries (zinc-air).
Cleaning and care – wipes, drying capsules/boxes, cleaning tools and sprays to keep performance stable.
Compatibility basics: how to make sure you’re buying the right part
Phonak accessories are often family-specific. Two items can look similar but still not be compatible due to differences in receiver type, dome system, or wax protection style. Before you order, check:
Receiver type on your Audéo B 312 (the connector and receiver family determines which domes and wax guards fit).
Dome system (Phonak uses different dome platforms depending on receiver generation).
Receiver length (often marked on the wire, e.g., 0/1/2/3) and power level (S/M/P/HP depending on what you have).
Battery size (for this model: 312).
If you’re unsure, the safest route is to match what you currently use: compare the shape of the dome connection, the wax guard style, and any markings on the receiver/wire.
Phonak Audéo B 312 domes: types and how to choose
Domes influence both comfort and sound. With the right dome, you’ll typically get better clarity, fewer feedback whistles, and a more stable fit.
Common Phonak dome types (what they’re for)
Open domes – best when you want a more “open” feeling and natural sound, often used for mild to moderate losses.
Closed domes – adds more sealing than open domes, often improving bass and reducing feedback.
Power domes – stronger seal for more amplification needs; can help reduce feedback at higher volumes.
Tulip domes – a middle ground that can be comfortable for some users and reduce occlusion compared with fully closed options.
How to pick the right dome size
Dome sizes are typically measured in millimeters. If your current dome feels loose, falls out, or you notice more feedback, going one size up often helps. If it feels sore or creates pressure, going one size down may improve comfort.
When to replace domes
Replace domes when they feel stiff, discolored, torn, won’t stay on the receiver properly, or when comfort and sound quality drop. Many users replace them every few weeks to every couple months depending on earwax and wear.
Wax filters/guards for Phonak Audéo B 312: why they matter
Wax protection is one of the most common causes of “suddenly weak sound.” If the receiver outlet gets blocked, your hearing aid may sound muffled, quieter, or intermittent.
Signs your wax guard needs changing
Sound is weaker than usual even with a fresh battery
Sound is distorted, crackly, or cuts in and out
You need to increase volume more than normal
How to choose the correct wax protection
Phonak uses different wax protection systems depending on receiver generation. The correct choice is the one that matches your current receiver’s wax guard style (shape, color, and tool type). If you’ve previously changed it, reorder the same model to ensure compatibility.
Receivers for Phonak Audéo B 312: power level and length
The receiver (speaker) on an Audéo B 312 can be replaced if it has failed or if your hearing professional has fitted a different power level. Compatibility depends on the receiver family used with your device and on the length and power you need.
How to identify receiver length and power
Many Phonak receivers have markings on the wire/connector indicating length (commonly 0–3) and a letter for power. If you can’t find the marking, compare to your existing receiver or check your fitting paperwork.
When a receiver is likely the problem
No sound in one side even after changing battery, dome and wax guard
Sound cuts out when the wire is moved
Intermittent sound despite clean contacts and good battery
Batteries for Phonak Audéo B 312 (size 312)
The Phonak Audéo B 312 uses size 312 zinc-air batteries. If you’re getting short battery life, check for:
Old or expired battery pack
Not allowing the battery to “breathe” after removing the tab (waiting ~1 minute can help)
Higher streaming/usage than normal
Moisture buildup (consider drying solutions)
Common Phonak Audéo B 312 issues (and what to try first)
Feedback/whistling
Try a slightly larger dome or a more closed style
Check that the dome is fully attached and inserted correctly
Replace wax guard if blocked
Muffled or weak sound
Change the wax guard first
Replace the dome if it’s worn or clogged
Try a fresh 312 battery
Sound cuts in and out
Inspect for moisture; dry the device overnight
Check that the dome and receiver are securely connected
If it persists, the receiver wire may need replacement
Buy Phonak Audéo B 312 accessories at Japebo
Once you know which part you need, you can shop confidently. The most important step is matching the accessory to your current setup (receiver type, dome platform, and wax protection style). If you’d like, share a photo of your receiver end (including the dome connection and wax guard), and we can help you identify the correct compatible parts for your Phonak Audéo B 312.
FAQ: Phonak Audéo B 312 accessories
What battery does the Phonak Audéo B 312 use?
It uses size 312 zinc-air hearing aid batteries.
Are all Phonak domes compatible with the Audéo B 312?
No. Compatibility depends on the receiver and dome platform fitted to your device. The safest option is to match the dome type you already use (same connection style and size).
How often should I change wax filters?
It varies by earwax and usage, but many users change them every few weeks or whenever sound becomes weak/muffled.
How do I know if I need a new receiver?
If you’ve tried a fresh battery and replaced the wax guard and dome, but sound is still missing or intermittent, the receiver is a common cause—especially if moving the wire changes the sound.
Can I switch from open domes to closed or power domes?
Often yes, but it can change sound and comfort. A tighter seal can reduce feedback and increase bass, but may feel more occluding. If you’re unsure, try the next “more closed” option step-by-step.