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Related Experiment Videos

Peak-clipping in induction loop systems.

E Trinder

    British Journal of Audiology
    |May 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Induction loop systems for the hearing impaired can function effectively even with peak clipping. This technical adjustment can reduce amplifier power requirements, making loop systems more affordable and accessible.

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    Area of Science:

    • Audiology
    • Acoustic Engineering
    • Assistive Listening Devices

    Background:

    • Induction loop systems are crucial assistive listening devices for individuals with hearing impairments.
    • The cost of amplifiers, often dictated by the need to handle speech peaks, is a significant barrier to widespread installation.
    • Current systems require amplifiers four times more powerful than average speech levels to accommodate peaks.

    Purpose of the Study:

    • To investigate the impact of peak clipping on the intelligibility of speech in induction loop systems.
    • To determine if reducing amplifier power by clipping speech peaks affects the performance of hearing loops.

    Main Methods:

    • The study observed two installed induction loop systems used by hearing-impaired audiences.
    • These systems intentionally employed peak clipping, where high-amplitude speech sounds were limited.

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  • The audibility and speech discrimination of users were assessed without prior knowledge of the clipping.

    • Main Results:

    • Peak clipping in induction loop systems did not result in a significant loss of speech intelligibility.
    • Despite the clipping, users could still discriminate speech sounds effectively.
    • This suggests that high fidelity, while preferable, is not strictly essential for functional intelligibility.

    Conclusions:

    • Peak clipping is a tolerable technical adjustment for induction loop systems.
    • This finding can lead to reduced amplifier power requirements and lower installation costs.
    • Making induction loop systems more cost-effective can increase their adoption and accessibility for the hearing impaired.