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Using telecoil avoids the feedback that often results from putting a hearing aid up against a sound source, helps over-amplification and eliminates background noises. The telecoil can be activated by the switch on the hearing aid when it is set in the "T" position. The signal is then converted to sound by the hearing aid. Telecoils (T-coils, T-switches)Ī telecoil is a very small coil of wire inside a hearing aid that serves as an antenna, which can pick up electromagnetic signals generated by hearing-aid compatible devices, such as telephone, special purpose microphone, and induction loops.
#Sound control hearing aids manual#
Look at your owner's manual or hearing aid to see if there are metal contact points on the hearing aid. Many owners of BTE hearing aids don't realize that the hearing aid has DAI capability. Wires connecting the hearing aid to a device need to be well-shielded as they can unintentionally act as antennas for nearby radio transmitters. DAI capability is usually available only in selected behind-the-ear hearing aids. It is an important option for people who need to use the telephone around sources of EMI such as computer monitors or heavy machinery. By its very nature, DAI is susceptible to far less interference, and yields a better quality audio signal. Direct Audio Inputĭirect Audio Input (DAI) allows the hearing aid to be directly connected to an external audio source like a CD player, TV, or an assistive listening device (ALD). This can happen when the output sound is picked up by the microphone or the vibration from the speaker reaches the input microphone via the casing. Feedback Suppressionįeedback Suppression is a mechanism for minimizing the effect of output signals from the hearing aid from interfering with the input resulting in loud annoying and screeching sound. Some hearing aids even eliminate the volume control totally however many people still prefer to have the volume control available in additional to the automatic gain control.
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Experiments have shown that this feature is more beneficial to people with severe hearing loss however "automatic finger control" can achieve similar results. This eliminates the need of fiddling the volume control and offers some protection from loud noises. With wide dynamic range compression (automatic gain control), the hearing aid circuit will automatically amplify softer sound more than louder sounds. A hearing aid can easily cost you over $6,000. Do not automatically pay for the "best" unless you do not have to worry about money. These features may or may not be beneficial to you depending on your hearing loss severity and your environment. We have compiled the most common hearing aid features available. Hearing aid technology has improved leaps and bounds in recently years, especially with the introduction of digital hearing aids and computers.