Question

Define the following terms
a. Infrasonic sound
b. Audible sound
c. Ultrasonic sound ​

Answer 1

1. Infrasound, sometimes referred to as low status sound, describes sound waves with a frequency below the lower limit of human audibility. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high.
2. The human ear responds to sounds with frequencies in the range from 20 Hz to 20,000 Hz. This is called the audible range of the human ear. Drums, guitar strings, tuning fork, human vocal cords and diaphragms of loudspeakers are examples of audible range of sound.
3. Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults

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Answer 2

Answer:

A. Infrasonic sound:- Infrasonic: It is a sound with a frequency of less than 20Hz. ... Sonic: It is a sound with the frequency between 20 to 20,000Hz. This type of sounds is called inaudible sounds that means a human cannot hear.

B. Audible sound

Audible sound1. The sounds of frequency which are audible to the human ear is known as audible sound

Audible sound1. The sounds of frequency which are audible to the human ear is known as audible sound2. The frequency of audible sounds is usually between 20 Hz to 20 kHz

C. Ultrasonic waves are sound waves with frequency higher than 20 kHz. Ultrasonic waves have similar physical properties except that humans cannot hear it. ... The ultrasound imaging is one of the prominent applications of ultrasonic waves.