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Speech audiometry normally allows measurements to be made within the frequency range of _____

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Speech audiometry normally allows measurements to be made within the frequency range of _____

(a) 300–3000 Hz

(b) 30–300 Hz

(c) 300–3000 KHz

(d) 3–30K Hz

This question was addressed to me in examination.

My question is based upon Measurement of Hearing topic in section Audiometry of Biomedical Instrumentation

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Right option is (a) 300–3000 Hz

Easy explanation: Speech audiometry normally allows measurements to be made within the frequency range of 300–3000 Hz. Pure-tone audiometers usually generate test tones in octave steps from 125 to 8000 Hz, the signal intensity ranging from –10 dB to +100 dB.  Some patients may have impaired high frequency response due to high intensity level occupational noise at 4000 or 6000 Hz.

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