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Edexcel A-Level Physics Core Practical 4 Speed of Sound

Practise Edexcel A-Level Physics Core Practical 4 through speed-of-sound measurements using microphones, oscilloscope traces, time delay and wavelength methods.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • use microphone separation and oscilloscope time delay to calculate speed of sound
  • find frequency or period from oscilloscope divisions and signal-generator resonance
  • use antiphase microphone positions to determine wavelength before calculating wave speed

2.3.38 - Core Practical 4 - speed of sound in air question 1

[Maximum number: 2]

A student investigated the interference of sound waves. The student used a signal generator with two loudspeakers, as shown.

Figure for Question 2.3.38 - Core Practical 4 - speed of sound in air question 1 — Edexcel A-Level Physics AS

The student used this investigation to determine the speed of sound in air.

To determine an accurate value for the speed of sound, the student would need to use other apparatus.

Explain what other apparatus the student would need.

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