Guess which sound has a higher pitch: guitar or car horn?

Explain how the human ear works.

What are wavelength,frequency,time period and amplitude of a sound wave?

Give two practical applications of reflection of sound waves.

Does sound follow the same laws of reflection as light does? Explain.

$A$ person has a hearing range from $20\, Hz$ to $20\, kHz$. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as $344\, m \,s^{-1}$.