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Microphones and General understanding of Hearing aids
Tue, 05/18/2010 - 18:41
Every hearing aids use microphones to take in sounds from the surroundings. In typical auditory systems, we take have two ears that take in sound. It is mainly best if a hearing user has two microphones at ear level. Having a microphone on each side of the head helps with an valuable auditory skill, localization. Localization is the capability to know from where in space a sound is coming. This skill is used during orientation and mobility training.
In a body aid, those microphones are on the hearing aid and so are at the level of the listener's chest. This kind of arrangement does not allow for good localization.
BTE hearing aids can have directional or omnidirectional microphones. Omni directional microphones pick up sounds more or less equally in 360 degrees. Directional microphones pick up sounds in coming into the front of the hearing aid more than sounds coming in from other directions. Directional microphones may improve listening in noise but may make localization for travel harder.
Mon, 11/14/2011 - 00:05
#2
All hearing aids are made of three basic parts: the microphone, the amplifier, and the receiver. The microphone gathers sounds and sends them to the amplifier. The amplifier converts the sounds into either electronic or digital signals, which are then sent to the receiver. The receiver is generally located right next to the ear drum, and it takes the signals and converts them back into sounds so that you can hear them. Larger hearing aids often have larger amplifiers, and they are generally used for more severe hearing loss.
A hearing aid is a device that helps a person with a hearing loss get better access to sound. Some of the earliest devices looked liked huge horns or trumpets with the listener holding the small end to his or her ear and pointing the larger end towards the speaker. Luckily, hearing aids have become more sophisticated and useful to more people since that time. Sadly, hearing aids have become more expensive and rely on fine electronics that often need repair, especially when worn by a young child.
Today's hearing aids use batteries for power, have microphones to take in sounds, have circuits that make the sounds louder and have some way to get the changed sound to the listener's ear.