An oboe player performs a single, sustained note. A listener nearby notices that while the pitch of the note stays exactly the same, its loudness gradually increases.
Which option correctly describes the amplitude and the frequency of the sound wave?
amplitude is constant, frequency is constant
amplitude is constant, frequency is varying
amplitude is varying, frequency is constant
amplitude is varying, frequency is varying
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.