10b217 Hearing Aid

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    Project By Bosco Dsouza

    Roll No 10B217

    Subject - Embedded Systems

    Topic Hearing Aid

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    What is Embedded System

    An embedded system is a computer system designed

    for specific control functions within a larger system.

    It is embedded as part of a complete device often

    including hardware and mechanical parts. Embedded systems control many devices in common

    use today.

    Embedded systems contain processing cores that are

    typically either microcontrollers or digital signalprocessors.

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    Hearing Aid

    Digital Signal Processor As mentioned earlier, the data (voice, image, video,

    electric signal & other measurable quantities) collected by

    embedded systems may be used for various kinds of data

    processing. Embedded system with signal processor functionalities

    are employed in applications demanding signal

    processing like speech coding, synthesis, audio-video

    codec, transmission applications, etc.

    A digital hearing aid is a typical example of an embedded

    system employing data processing.

    Digital hearing aid improves the hearing capacity of

    hearing impaired persons.

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    Main Causes of Hearing loss

    Very loud noise - Listening to loud noise for

    long periods of time can damage the hair cells in

    the inner ear.

    Mobiles - High frequency and radiation

    emitted from it affects hearing permantatly.

    Age.

    Earwax. Ototoxic medicines.

    Injury to the ear or head.

    Ear infection.

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    Hearing Aid

    Hearing aids are small devices designed to help those with hearingimpairment to enjoy improved communication.

    These devices enhance sound and enable the wearer to hear the

    natural sounds being made even through impaired hearing.

    There are a number of different types of hearing aids, and they all

    work along the same principles, although some are more

    sophisticated or offer more features than others.

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    Parts of Hearing Aid

    Microphone Amplifier

    Speaker

    Battery & Optional controls

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    Working Principle Of Hearing Aid

    Microphone A microphone picks up sound from

    the environment and converts it into an electricalsignal, which it sends to the amplifier.

    Amplifier

    An amplifier increases the volumeof the sound and sends it to the speaker.

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    Speaker

    speaker changes the electrical

    signal back into sound and sends it into theear. Then those impulses are sent to the brain.

    Battery -

    The battery powers the electroniccomponents. The battery compartment is used

    to turn the hearing aid on and off.

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    Some models have a volume control to regulate

    the volume.

    Others have a program control, enabling you to

    change the processing for different listening

    situations, such as high background noise or

    music. These controls are available on the hearing aids or

    on a remote control.

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    By using hearing aid even a deaf person can hear. The hearing aid can emmit frequency of 10,000hz and

    more.

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