Some hearing aid optional features improve your ability to hear in specific situations:
Noise reduction. All hearing aids have some amount of noise reduction available. The amount of noise reduction varies.
Directional microphones. These are aligned on the hearing aid to provide for improved pick up of sounds coming from in front of you with some reduction of sounds coming from behind or beside you. Some hearing aids are capable of focusing in one direction. Directional microphones can improve your ability to hear when you're in an environment with a lot of background noise.
Rechargeable batteries. Some hearing aids have rechargeable batteries. This can make maintenance easier for you by eliminating the need to regularly change the battery.
Telecoils. Telecoils make it easier to hear when talking on a telecoil-compatible telephone. The telecoil eliminates the sounds from your environment and only picks up the sounds from the telephone. Telecoils also pick up signals from public induction loop systems that can be found in some churches or theaters, allowing you to hear the speaker, play or movie better.
Wireless connectivity. Increasingly, hearing aids can wirelessly interface with certain Bluetooth-compatible devices, such as cellphones, music players and televisions. You may need to use an intermediary device to pick up the phone or other signal and send it to the hearing aid.
Remote controls. Some hearing aids come with a remote control, so you can adjust features without touching the hearing aid.
Direct audio input. This feature allows you to plug in to audio from a television, a computer or a music device with a cord.
Variable programming. Some hearing aids can store several preprogrammed settings for various listening needs and environments.
Environmental noise control. Some hearing aids offer noise cancellation, which helps block out background noise. Some also offer wind noise reduction.
Synchronization. For an individual with two hearing aids, the aids can be programmed to function together so that adjustments made to a hearing aid on one ear (volume control or program changes) will also be made on the other aid, allowing for simpler control.