Question

What are 3 types of sound?

Answer 1

Hint: The SI unit to measure sound is Hertz. The classification of sound is based on the frequency which ranges from below 20 Hz to 20,000 Hz and above.

Complete step by step solution:
Sound is defined as the vibration that travels in the form of longitudinal waves and requires a medium to travel. They are also known as mechanical waves since they always need a medium to travel. The medium can be in the form of solid, liquid, or gases. In this, there is a vibration of particles that happens parallel to the direction of propagation of waves.

There are 3 types of sounds that are present, that are:
Infrasonic sound: Infrasonic sound is also known as infrasound. It is a sound wave that has a frequency of less than 20 hertz. Sources of infrasound in nature are volcanoes, avalanches, meteorites, etc.

Sonic sounds: Sonic sounds are defined as sounds that range from 20 to 20,000 hertz. They are also known as inaudible sounds since these sounds cannot be heard by human beings.

Ultrasonic sounds: Ultrasonic sounds are sounds that have a frequency range of more than 20,000Hz. These types of sounds are audible to animals such as dogs, bats, etc. These sounds are not different from other types of sound in the matter of their physical properties and the only difference is that it is above the upper hearing limit of human beings.

Note: There are 5 properties of sound that are of major importance:
1) Pitch- It is defined as the perception of sound frequency that is in the range of human hearing. The higher the frequency of a sound, the higher will be the pitch.
2) Amplitude- It refers to how loud the sound is. It is also defined as the measure of the energy of vibration.
3) Speed- The speed of sound will be different for different mediums. Speed refers to how fast a sound can travel through a medium.
4) Reflection of sound- Sound waves follow the laws of reflection like light waves. The ability of a sound wave to strike a surface and bounce back into the same medium is described as the reflection of sound.
5) Timbre – It is defined as the ability to differentiate sound that is of the same frequency. Timbre varies because sound is produced by different mediums.