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EnglandMusic TechnologyQuick questions
The principles of sound
Quick questions on Amplitude, frequency and wavelength: describing a sound wave - Edexcel A-Level Music Technology
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is sound as a longitudinal pressure wave?Show answer
Because sound is a pressure variation, it needs a medium and cannot travel through a vacuum. When we draw a sound wave as a smooth curve, that graph is pressure (or the equivalent voltage from a microphone) plotted against time. The curve is a convenient transverse picture of a wave that is physically longitudinal.
What is q1?Show answer
State what amplitude and frequency each control in a sound we hear. [2 marks]
What is q2?Show answer
A note has a period of ms. Find its frequency. [2 marks]
What is q3?Show answer
Calculate the wavelength of a Hz note if the speed of sound is m per second. [2 marks]
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