What do you mean by the audible range of frequency?

Hint: For this question, you have to know all the concepts related to the audio frequency or also known as audible frequency. This audio frequency is a periodic vibration whose frequency is in that frequency band or range that is audible to the average human hearing range.

Complete step by step solution:
The human ear cannot hear the sound having frequencies less than $20Hz$. So, any sound having a frequency below this will be inaudible sound for human ears, and the amplitude of the sound wave depends on the loudness of the sound.

The human ear can hear the sound having frequencies between the range of $20Hz$ to $20kHz$. Hence we can say that any sound having this frequency range is known as audible sound.

Hence, the range of sound frequency that can be heard by a human being is called the audible range of frequency.

Additional information:
Sound waves are longitudinal waves that can travel through air or water as a medium. Sound is a type of energy that is produced by vibrations in the air molecules. Frequency is the most important property of sound and it helps to determine the pitch of the sound and is measured in hertz.

Sound can be of various types that are loud, soft, unpleasant, pleasant, musical, inaudible, audible, etc. this all can be dependent upon the amplitude and frequency of the sound waves.

Note: Human infants can really hear the sound having frequencies slightly above than $20kHz$ but they lose some high frequency sensitivity as they grow up, the upper limit of frequency that an adult is closer to $15 - 17Hz$.