Every electrical hearing aid has three parts; a microphone, an amplifier and a receiver.
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Microphone:
This collects the sound and converts it into electrical impulses. These reproduce the rise and fall of pitch of the sound (high or low) and the intensity (loudness measured in decibels).
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The Amplifier:
The amplifier modulates the electrical impulses to make sounds louder or quieter. It can have an integrated circuit with up to 30 transistors or a combination of circuits. The digital aid uses an efficient micro-chip.
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Receiver: The receiver converts the amplified signal into sounds and feeds them into the ear.
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Hearing Aids get their power from tiny Batteries
Hearing aid technology can be divided into two categories:
Analog Hearing Aids
This conventional technology amplifies all sounds equally. Your Audiologist sets the amplification level, though it can be adjusted later. Loud sounds may require you to manually turn down the volume on your hearing aid. This type of technology is best for people who do their communicating in relatively quiet situations. Basic analog is the least expensive technology. Analog hearing aids are slowly being phased out. Some companies make only digital hearing aids.
Digital Hearing Aids
With this type of technology, a computer chip converts incoming sound into digital code, then analyzes and adjusts the sound based on your hearing loss and listening needs. The signals are then converted back into sound waves and delivered to your ears. The result is sound that’s more finely tuned to your hearing loss. Digital hearing aids are available in all styles and the price you pay will depend on the features you choose. More advanced digital signal processing capabilities tend to translate into higher cost. If price is a concern, let your Audiologist know and choose the best combination of features in your price range.