Sound

Question 1

What is shockwave ultrasound and what is it used for?

Answer 1

Shockwave ultrasound sends small wavelength ultrasonic wavelengths through the body. This is a non-imaging technique as the mechanical energy of the sound waves is transmitted to structures associated with human disease, generating high-amplitude vibrations that contribute to tissue destruction.

Question 2

What is the formula for the wavelength of a double-closed or double-opened pipe/string?

Answer 2

Wavelength = (2L)/N

L = length of string or pipe 
N = number of harmonic

Question 3

What is the formula for the wavelength of a pipe or string that is closed at one end?

Answer 3

Wavelength = (4L)/N

Question 4

How does the intensity of sound change when it passes through a new medium?

Answer 4

The intensity will decrease when sound crosses from one medium to another because a portion of the wave’s energy will be reflected.

Question 5

How does the velocity of sound change in gasses, liquids, and solids?

Answer 5

Velocity of sound:

Solid>Liquid>Gas

Question 6

What is the relationship between velocity, wavelength, and frequency?

Answer 6

Velocity = Wavelength * Frequency