Sound is a form of energy that is produced by vibrating bodies. But do we hear sound of every vibrating body? The answer is NO. We have two types of sound- audible sound and inaudible sound. These sounds are categorized on the basis of their frequency ranges
Some animals like dogs have the ability to hear sounds having frequencies higher than 20 KHz. The police department uses whistles with frequencies higher than 20 KHz so that only dogs can listen to it. Inaudible frequencies are helpful for many purposes. These are used in many fields like research and medical. The ultrasound equipment used for tracking and studying many medical problems works at frequencies above 20 KHz.
As we grow older and are exposed to sound for longer period of time, our ears get damaged and the upper limit of audible frequencies decreases. For a normal middle aged adult person, the highest frequency which they can hear clearly is 12-14 kilohertz.
So from the above discussion now we know how sound can be differentiated on the basis of frequency range and its application. To know more about sound, download BYJUS- the learning app.
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