The number of channels available for programming differs among hearing aids. With more channels, hearing aids can be programmed to more accurately fit your hearing loss
One of the most difficult listening situations for individuals with hearing loss is understanding conversation in noisy environments. The most effective way of minimizing the negative effects of surrounding noise is to have two microphones on each hearing aid.
Some hearing aids have microphone settings that change between omni-directional and directional. Omni-directional microphones pick up sounds coming from all around. Directional microphones pick up sounds from front listening direction. In noisy listening situations a directional microphone can reduce the loudness of sounds and noise coming from behind
Acoustic feedback in hearing aids is the high-pitched whistling sound that you may have heard from some older hearing aids.
Most digital hearing aids have a feedback manager that reduces feedback.
Multiple programs or memories can be stored in hearing aids and accessed using a push button or through a remote control. These programs optimize the hearing aids for different listening environments.
Many hearing aids internally record the number of hours the hearing aids are worn, which programs are being used, how often and how much the volume is increased or decreased.
An automatic telephone program is available in some instruments. It automatically perceives the presence of the electromagnetic signal from a hearing aid compatible phone and switches the hearing aid to either an acoustic telephone or tele-coil program.
This technology uses a Bluetooth or wireless streaming device to receive sound from Bluetooth transmitters and send the sound to the hearing aids. For example, the streaming device will pick up the Bluetooth signal from a cell phone and directly transmit the signal to your hearing aids. Wireless devices are also available to stream other audio signals directly to the hearing aids, like the audio signal from a television or MP3 player.
These hearing aids are water, sweat, moisture and dust resistant.