1. Why can't Bluetooth connect to two devices at the same time?
Current status: Exclusive connection to a single device
Current Bluetooth headphones or hearing aids (based on classic Bluetooth technology) work like a dedicated relationship — they are designed for "exclusivity."
Connected to your phone? Your iPad won't find it: Once a hearing aid pairs with your iPhone, it essentially "hides" and stops broadcasting signals to your iPad.
Must disconnect first before connecting to another device: You need to manually disconnect Bluetooth from your phone before your iPad can discover and connect to the hearing aid.
Why is it designed this way? To ensure smooth, lag-free audio streaming for music and phone calls. This is not a quality issue, but rather a rule of the current Bluetooth protocol.
2. Why does the "hearing aid function" disappear during phone calls?
Current status: Can't have both at the same time
You may have noticed that while wearing hearing aids during a call, the volume increases, but the usual noise reduction and background filtering functions seem to be absent.
Separate processing paths: Hearing aids have two internal processing paths — one for Bluetooth audio (music, videos, calls) and one for environmental sound (the core hearing aid path).
Limited chip capacity: The current hearing aid chip has limited processing power. Once a Bluetooth call comes in, the system shuts down the hearing aid path to fully dedicate resources to the Bluetooth path.
The result: What you hear is simply amplified phone audio, not professionally optimized, clear hearing-aid-processed sound.
3. Next-generation technology: Bluetooth calling and hearing aid function working simultaneously
Future: Both functions, with the best of both
Next-generation hearing aids will feature a more powerful "brain" (high-performance chip), completely solving this problem:
Dual-task processing: The chip's computing power is doubled, enabling simultaneous processing of Bluetooth audio and ambient environmental sound.
Sound blending: Even during a Bluetooth call, the hearing aid's noise reduction and speech enhancement features remain fully active. It perfectly blends the processed call audio with the processed environmental sound for you to hear.
Ultra-low latency: The entire process is faster than the blink of an eye (under 15 milliseconds) — you won't notice any delay.
Summary
Previously: You couldn't use hearing aid functions while on Bluetooth, and switching between devices required repeated disconnections.
In the future: Bluetooth calling and hearing aid functions work simultaneously. Whether you're video calling on a noisy street or making a phone call in the wind, the hearing aid filters out background noise, allowing you to hear both your device and the world around you clearly.
