What are the different behaviors of sound?

What are the 4 boundary behaviors?

There are essentially four possible behaviors that a wave could exhibit at a boundary: reflection (the bouncing off of the boundary), diffraction (the bending around the obstacle without crossing over the boundary), transmission (the crossing of the boundary into the new material or obstacle), and refraction (occurs …

What are 3 types of sound?

The three types of sound are:

  • Infrasonic: It is a sound with a frequency of less than 20Hz. Elephants use Infrasonic sounds to interact with herds hundreds of km away.
  • Sonic: It is a sound with the frequency between 20 to 20,000Hz. …
  • Ultrasonic: It is a sound with a frequency more than 20,000Hz.

What are the five sources of sound?

Acoustic instruments, Electrical instruments, Living beings like animals and birds using their vocal cords, Man-made sources like machines, any vibration caused by wind are five sources of sound.

What are the 7 types of waves?

Though the sciences generally classify EM waves into seven basic types, all are manifestations of the same phenomenon.

  • Radio Waves: Instant Communication. …
  • Microwaves: Data and Heat. …
  • Infrared Waves: Invisible Heat. …
  • Visible Light Rays. …
  • Ultraviolet Waves: Energetic Light. …
  • X-rays: Penetrating Radiation. …
  • Gamma Rays: Nuclear Energy.

How do sound waves behave?

When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well. This makes them bump into more nearby air molecules. This “chain reaction” movement, called sound waves, keeps going until the molecules run out of energy.

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What is a sound in physics?

In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. … Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound.

What is reflected sound called?

Reflection of sound waves from a surface is called an echo or a reverberation.

How are sound waves refracted?

Sound waves across boundaries

This change in velocity can also result in a change of direction of the sound wave – also known as refraction. For example, refraction occurs when sound travels from warm air into cold air. When this happens: the wavelength of the sound wave decreases.