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4.3 Sound, ultrasound and infrasound

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Question 7

An engineer measures the dominant frequency of the sound produced by three sources in air.

SourceFrequencyClassification
motion sensor35 kHz35\ \text{kHz}35 kHz
ventilation fan14 Hz
alarm1.6 kHz1.6\ \text{kHz}1.6 kHz

Classify the sound from each source as infrasound, audible sound or ultrasound. Write your answers in the table.

[2]
Markscheme

4.3 Sound, ultrasound and infrasound Questions

  1. GCSE
  2. /Physics
  3. /4.3 Sound, ultrasound and infrasound

112 exam-style questions on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound, covering 4.3.1 Sound waves, vibrations and the human ear, 4.3.2 Ultrasound and infrasound, 4.3.3 Uses of ultrasound and infrasound, and 4.3.4 Sound waves passing between media. Each one has a worked solution and a mark scheme showing where the marks go.

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