A sound wave has a frequency of 2KHz and wavelength of 45cm. It takes 4 seconds to travel. Calculate the distance it travels.
2000 Hz 2 kHz Sine Wave Sound Frequency Tone - YouTube
On waveform distortion in the frequency range of 2 kHz–150 kHz—Review and research challenges - ScienceDirect
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Ear Training for Audio Engineers – IMPROVE YOUR MIXES – Audio University