CAIE IGCSE Physics 3.4.3 Approximate range of frequencies

Practise using the human audible frequency range to judge whether sounds fall within normal hearing or outside it.

Exam points

state the approximate audible range for a healthy human ear as 20 Hz to 20 000 Hz
compare animal and human frequency ranges to decide which sounds a person can hear

[Maximum number: 1]

A loudspeaker produces a sound wave in air. The distance between the centre of a compression and the centre of a neighbouring rarefaction is 0.10 m .

Explain whether the sound from the loudspeaker is audible to a human with normal hearing.

audible/yes/it is OR inaudible / no / it isn't consistent with value in 5(c)(i)

AND

consistent explanation with reference to $20(\mathrm{~Hz}) \leqslant$ normal range of human hearing $\leqslant 20000(\mathrm{~Hz})$

B1

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3.4.3—Approximate range of frequencies question 1