Wednesday 6 May 2020

acoustics - Frequency dependance of sound wave reflection


Why are high frequencies reflected more than low frequencies off an 'acoustically hard' surface such as concrete? I basically understand that the amount of reflection is determined by the impedance ratio between the two mediums (i.e air/concrete). But does that mean that high frequency sound waves have a lower acoustic impedance than low frequencies (hence why high frequencies are reflected and more than low frequencies?).




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