Explain uses of ultrasonic sound.

The uses of ultrasonic sounds are:1. They are used in medical field for diagnosis and treatment of internal illnesses of the human body.2. Using ultrasound, kidney stones can be broken into small grains which later on get flushed out through the urine.3. Ultrasonography is used to examine the foetus during pregnancy.4. Ultrasound is also used in heart checks (ECG).5. Industrially, ultrasonic sounds are useful in examining metals for defects like cracks etc. and for cleaning machine parts.

When ultrasonic, infrasonic and audible waves travel through a medium with speeds \\(v_u\\), \\(v_i\\) and \\(v_a\\) respectively, then :

The speed of a sound wave is used to be affected by the medium property. But it remains almost independent by the change of frequency of the wave. So option a will be right.

Give five uses of ultrasonic waves ?

Ultrasonic waves are used in echocardiography It is used to construct the image of the heart(it) .Ultrasonic waves are used in the detection of cracks in metal blocks.Ultrasonic waves are used to kill bacteria in liquid.Ultrasonic waves for determining the depth of the sea.Ultrasonic waves is also used to see what is happening to the components inside a nuclear reactor.

Ultrasonic waves produced in a medium can be detected by

Sound in air is propagated only by means of longitudinal waves; waves in which the particle's motion consists of oscillations back and forth in the direction of propagation. In a solid such as a metal rod, sound can be transmitted either by longitudinal or transverse waves. Using a Kundt'd tube which is an apparatus consisting of a glass tube supported on a metal base, longitudinal sound waves can be produced. Using the properties of wave motion, the frequency of the sound and the speed of sound in the rod can be determined. A clamp at one end of the tube's base holds a metal rod which has a metal disk attached to one end. The rod and disk extend inside the glass tube, whose position can be adjusted to center the tube about the disk.It is important to make sure the disk is not touching the glass because the vibrations set up in the rod will break the glass. A stopper closes the other end of the tube. The velocity of any wave is given by: v = fl where f is the frequency and l is the wavelength. When the rod is properly stroked and set into vibration, standing waves are set up in the vibrating rod. Since the rod is clamped at its center point, this point is a node (zero amplitude of motion) and the ends which are free to vibrate are antinodes (maximum amplitude of particles' motion along the direction of the rod).When the rod is vibrating in this manner it is vibrating with its fundamental frequency and the wavelength of the standing wave is twice the length of the rod. The vibrations of the rod are transmitted by the disk to the air in the glass tube closed at one end.The waves set up in the air in the glass tube have the same frequency as those in the rod. The waves are reflected at the closed end of the tube and the air in the tube is thus acted upon by two similar sets of waves travelling in opposite directions. When the length of the air column is some multiple of half wavelengths, the two oppositely travelling waves produce standing waves. The standing waves are characterized by alternate points of maximum and minimum disturbance called respectively nodes and antinodes. These nodes and antinodes may be detected by cork dust placed in the tube, the cork dust showing characteristic striated vibration patterns at the antinodes. The distance between two successive patterns is therefore one-half the wave length of the sound in the air. The wave length of the sound in air is thus determined. From tables the velocity of sound in air at the temperature of the room is obtained and using the above-referenced equation the frequency may be computed. Since this is the frequency of the sound wave in the metal rod and since the wave length is twice the length of the rod, we can compute the velocity of the sound waves in the metal rod using the above-referenced equation.

The type of waves produced by bats are

Bats send out sound waves using their mouth or nose. When the sound hits an object an echo comes back. The bat can identify an object by the sound of the echo. They can even tell the size, shape and texture of a tiny insect from its echo. Most bats use echolocation to navigate in the dark and find food. The sound waves produced by the bats are ultrasonic waves. Bats emit sounds at typically 2 or 3 times higher pitch than we can hear. Sounds above human hearing are usually called ultrasonic.

Write two uses of ultrasonic sound.

Use in SONARTo find out the disease and treatment in medical field.

Ultrasound has frequency of vibration

Longitudinal waves whose frequencies that lie above 20 kHz or 20,000 Hz are called ultrasonic waves or ultrasounds. Human beings are unable to detect these waves but other animals respond better to these waves.

Which of the following is NOT an application of ultrasound waves?

Stethoscope is an acoustic medical device for listening to the internal sound of a living being. It works on reflection of sound.

Explain how defects in a metal block can be detected using ultrasound.

Ultrasound is passed through one end of the metal and a detector is installed at the other end. When the metal is perfect, the ultrasonic waves travel as expected and hence are detected on the other end. For a metal with a defect, the waves are reflected back and hence don't reach the other end. When no detection is received, it can be concluded that the metal has a defect.

What are ultrasonic waves ?

The audible frequency range for human ear is from 20Hz to 20000Hz , above frequency 20000Hz , sound waves are called ultrasonic and below 20Hz , they are infrasonic . So it is clear that sound waves having frequency higher than audio frequency range (20.000Hz) , are ultrasonic waves .

Supersonic and Ultrasonic | Definition, Examples, Diagrams

definition

Define subsonic, transonic, supersonic and hypersonic on the basis of Mach number and identify effects related to each

Mach number is defined as:

M = \frac{u}{c}

,
where:
1. M is the Mach number,
2. u is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel).
3. c is the speed of sound in the medium.

Depending upon the value of Mach number flow can be categorized as follows:
1. Subsonic:

M < 0.8

2. Transonic:

0.8 < M < 1.2

3. Supersonic:

1.2 < M < 5

4. Hypersonic:

5 < M < 10

definition

Sonic Boom

When a plane travels faster than speed of sound, the plane breaks the sound barrier and produces a loud sound. This is called sonic boom.

definition

Ultrasonic and supersonic

Ultrasonic is used for ultrasound waves and is defined as waves with frequency more than 20 kHz. They cannot be heard by human beings.
Supersonic is used for objects which travel at a speed greater than the speed of sound. These objects create sonic boom (sound associated with supersonic objects) generating enormous amounts of energy sounding like an explosion.

Supersonic and Ultrasonic

definition

Define subsonic, transonic, supersonic and hypersonic on the basis of Mach number and identify effects related to each

definition

Sonic Boom

definition

Ultrasonic and supersonic

REVISE WITH CONCEPTS

Applications of Ultrasound

Quick Summary With Stories

Supersonic and Sonic Boom

Explain uses of ultrasonic sound.

When ultrasonic, infrasonic and audible waves travel through a medium with speeds $v_{u}$ , $v_{i}$ and $v_{a}$ respectively, then :

Give five uses of ultrasonic waves ?

Ultrasonic waves produced in a medium can be detected by

The type of waves produced by bats are

Write two uses of ultrasonic sound.

Ultrasound has frequency of vibration

Which of the following is NOT an application of ultrasound waves?

Explain how defects in a metal block can be detected using ultrasound.

What are ultrasonic waves ?

definition

Define subsonic, transonic, supersonic and hypersonic on the basis of Mach number and identify effects related to each

definition

Sonic Boom

definition

Ultrasonic and supersonic

REVISE WITH CONCEPTS

Applications of Ultrasound

Quick Summary With Stories

Supersonic and Sonic Boom

Explain uses of ultrasonic sound.

When ultrasonic, infrasonic and audible waves travel through a medium with speeds vu​, vi​ and va​ respectively, then :

Give five uses of ultrasonic waves ?

Ultrasonic waves produced in a medium can be detected by

The type of waves produced by bats are

Write two uses of ultrasonic sound.

Ultrasound has frequency of vibration

Which of the following is NOT an application of ultrasound waves?

Explain how defects in a metal block can be detected using ultrasound.

What are ultrasonic waves ?

When ultrasonic, infrasonic and audible waves travel through a medium with speeds $v_{u}$ , $v_{i}$ and $v_{a}$ respectively, then :