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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Sound level meter and its applications

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Beginner

Intermediate

Advanced

Acoustic amplifier output is generally specified in terms of its

a: acoustic PWL Explanation

Explanation

b: acoustic SPL Explanation

Explanation

c: electrical wattage Explanation

Explanation

d: loudness Explanation

Explanation

Loudness level is the SPL at

a: low frequency of 100 Hz Explanation

Explanation

b: frequency of 1000 Hz Explanation

Explanation

c: high frequency of 10000 Hz Explanation

Explanation

d: none of the above Explanation

Explanation

The response of the sound level meter is weighted suitably so as to provide

a: a response similar to that of the human ear Explanation

Explanation

b: linearised response at different frequencies Explanation

Explanation

c: frequency spectra at different frequencies Explanation

Explanation

d: all of the above Explanation

Explanation

Audio-frequency range lies

a: between 20000 and 30000 Hz Explanation

Explanation

b: between 16 and 20000 Hz Explanation

Explanation

c: above 40000 Hz Explanation

Explanation

d: around 1000 Hz Explanation

Explanation

A noise source of 70 dB at 1 kHz has a loudness level of ____Phons

a: 80 Explanation

Explanation

b: 8 Explanation

Explanation

c: 7 Explanation

Explanation

d: 70 Explanation

Explanation

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