15.5 - Audible Wavelengths Provided that the amplitude is sufficiently great, the hu- man ear can respond to longitudinal waves over a range of Part A frequencies from about 20.0 Hz to about 20,000Hz. Determine the waves amplitude. Enter your answer in meters. Part A Compute the wavelength corresponding to f =20Hz for The factor that multiplies the cosine function (cos) is waves in air (v = 344 "). the amplitude. By inspection 344 344 1 m 1 = Af A = 17.2 m A = 6.10 mm = 6.1 mm x G.1 x 10- = 20 Hz 1000 mm 20