Sound waves on an oscilloscope David Bailey 19062021

Sound waves on an oscilloscope David Bailey 19/06/2021 © Class Leading Ltd. 2013 Free for non-commercial educational use provided that this copyright notice is included. 1

Sound waves on an oscilloscope Low amplitude = quiet sound High amplitude = loud sound Increasing amplitude Increasing loudness “The higher the amplitude, the louder the sound” 19/06/2021 © Class Leading Ltd. 2013 Free for non-commercial educational use provided that this copyright notice is included. 2

Sound waves on an oscilloscope Long wavelength = low pitched sound Short wavelength = high pitched sound Decreasing wavelength Increasing pitch “The shorter the wavelength, the higher pitched the sound” 19/06/2021 © Class Leading Ltd. 2013 Free for non-commercial educational use provided that this copyright notice is included. 3

Sound waves on an oscilloscope Low frequency = low pitched sound High frequency = high pitched sound Increasing frequency Increasing pitch “The higher the frequency, the higher pitched the sound” 19/06/2021 © Class Leading Ltd. 2013 Free for non-commercial educational use provided that this copyright notice is included. 4

Sound waves on an oscilloscope 1. • Same pitch • Louder Compared to this sound, how are the other sounds different? 2. 19/06/2021 3. • Higher pitch • Quieter • Higher pitch © Class Leading Ltd. 2013 • Same loudness Free for non-commercial educational use provided that this copyright notice is included. 5