Physics of Sound

Sounds Great

BASICS OF SOUND FOR SOUND ENGINEERS

LEWIS PRAVIN - Apple Certified Trainer

Sounds like

​Sound is Vibration of any matter that travels through Solids , Liquids or Gases ( Medium )

.Sound waves Pushes and Pulls the molecules to transmit their energy

Happy teaching!

MOX MEDIA

Properties of sound -Frequency

• Frequency of Sound

• WaveLength of Sound

Changing Direction of sound waves depending on Medium or change temperature of the medium

​Refraction

Bouncing back of Sound waves when it hits an obstacle is called reflection

​Reflection

Properties of sound

​Amplitude or Loudness

1. higher the peak to peak the sounds are Louder

2. Amplitude is not related to wavelength or Frequency or Speed

3. Amplitude is measured in dB = Decibels

Multiple Choice

Sound is made when a source of energy forces the matter to:

• shake

• vibrate

• move

• stay still

Multiple Choice

Sound waves travel as ________ waves Lewis Pravin

• transverse

• electromagnetic

• longitudinal

• surface

Multiple Choice

A rarefaction is generated when particles move ___________.

• together

• closer

• under

• apart

Multiple Choice

Sound waves cannot travel through which of these?

• paper

• milk

• outer space

• hydrogen

Multiple Choice

A back-and-forth motion causing particles to move close together generates a ______________.

• rarefaction

• surface

• transverse

• compression

Multiple Choice

In which of these types of media will sound travel fastest?

• solid

• liquid

• gas

• vacuum

Multiple Choice

Which temperature causes sound to travel more slowly?

• hot

• cold

Multiple Choice

Which physical property of a medium is defined by how close the particles of the substance are to each other?

• elasticity

• temperature

• density

• amplitude

Multiple Choice

High frequency sounds have __________ pitch.

• high

• low

Multiple Choice

Frequency of waves is measured in ___________.

• Hertz

• Decibels

• Watts

• meters/second

Multiple Choice

Which is true of a moving sound (doppler effect)?

• Sounds moving toward a person are a higher frequency and heard louder.

• Sounds moving toward a person are lower frequency and are heard softer.

Multiple Choice

Which is true of pitch?

• the lower the pitch the lower the frequency

• the lower the pitch the higher the frequency

• the lower the pitch the greater the amplitude

• the lower the pitch the lower the amplitude

Multiple Choice

Find the Distance (in feet)that sound wave will travel in 5 mins when temperature is 20 degree Celsius

• Romba dhuram

• 339000 ft/sec

• 100 ft /sec

• 1720 ft/sec

Multiple Choice

Sibi is 15 mins away from Mox , Saravanan is 1hr away from mox , for both of the to reach mox at same time , how long someone has to wait ? who should wait

• Sibi should wait 1 hr

• Sibi should wait 45 minutes

• Saravan should come fast

• Saravan should wait 15 minutes

​With the rising flood the lotus flower Raises
So as the dignity of Human raises as their thoughts are Positive and Uplifted !