Question

how ultrasonic and infrasonic are used in various fields of science and technology.also mention their working briefly

Answer 1

Normal Human Audibility Range is 20Hz to 20,000 Hz.

Infrasonic Sound :

Waves with frequencies less than 20Hz are known as Infrasonic.

This is below the range that a human ear can detect.Elephants and Giraffes use Infrasonic sound waves to communicate between herds over a greater distance.
Nowadays scientist are using microphones to track the herd of animals even if they are hidden in dense areas. Infra-sound can be used to detect Volcanic eruption.Scientist can use infra-sound to tract the meteors trough atmosphere.

Ultrasound :

The sound waves with frequencies greater than 20,000Hz are called as Ultra sound which human ear cannot detect.But it has many applications in various fileds like :

--->Industrial application:

1. Drilling holes or making cuts of desired shapes
.2. Ultrasonic Cleaning of dirty clothes, plates or any other objects.
3. To detect the defects in metal blocks.

---> Medicinal Application;
1. Imaging of organs like Ultra sound scanning of Stomach, liver, Uterus, gall bladder etc.
2.Echo cardiography[ECG]3. Ultrasounds are used to break the stones in kidney.

--> SONAR -Sound Navigation and Ranging -- This method is used to detect the objects under water by means of Ultrasonic waves.Sonar is also used to determine the depth of Ocean.

Answer 2

Hello Dear,

You're asking about the uses of Ultrasonic & Infrasonic waves in science & technology field.

Your answer is here →→

Working of Ultrasonic & Infrasonic→

→Ultrasonic waves are those which is higher then audible limit of human hearing i.e more than 20,000 Hertz. It measure the distance by sending the sound waves at a certain frequency. 

→Infrasonic waves are those which is lower in then audible limit of human hearing i.e Less then 20 Hertz.
It is working for underground explosion & atmospheric reference under the sea.




Uses of Ultrasonic waves in Science & tech field→→←←


1- In SONAR (Sound Navigation & Ranging)- It is the technique to navigate & communicate sound waves( Ultrasonic waves) under the surface of water. 

2-Detection of Cracks in Metallic Structure - Ultrasound is used to find the cracks in bigger metallic structure & buildings. Ultrasound generates the ultrasonic waveform which typically detect the crack and through special software it shows on Computer screens. 


3-Echo-cardiology - This is the process by which the image of human heart Appears on the screen through ultrasonic waves by attempting reflection inside the human body.

Some more uses of ultrasonic are cleaning of difficult component, Echolocation etc.



Uses of Infrasonic in Science & tech field→→←←


1-Leakage detection in Pipelines--Infrasonic waves is used to detect the leakage in Pipelines etc. It shows the accurate point from where the tiny leakage occurs. It detect the signal through algorithm and separate it quickly.


2- Used to detect in "TETON PASS"- In teton pass, it detect the frequent avalanches & send warning signals.


3-In Film soundtracks - In some film soundtracks it is used to create disorientation in the audience.So that Audience can easily heard clear sound.

⇒The reason for using the ultrasonic & infrasonic waves are using are-

a) They aren't easily absorbed in a medium

b) They can be confined in a narrow beam.

c) They can travel a long distance without deviation. 

I anticipate it help you.

Have a marvelous day. :-)