Exploring the Properties of Sound Waves

This video is the second part of an audio basics series, focusing on the properties of sound waves. It covers phase, frequency, period, wavelength, amplitude, and decibels. The video explains how phase is measured in degrees, how frequency relates to pitch, and the difference between period and wavelength. It also discusses amplitude and the use of decibels to measure sound pressure levels. The video aims to provide a comprehensive understanding of these fundamental audio concepts.

What does the phase of a sound wave describe?

• The frequency of the wave

• The period of the wave

• The points around the circle on a graph

• The amplitude of the wave

At what degree does the line cross the x-axis during the compression phase?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

What is the frequency range that humans can hear?

• 1 Hz to 1000 Hz

• 20 Hz to 20 kHz

• 10 Hz to 15 kHz

• 100 Hz to 10 kHz

How is frequency measured?

• Decibels

• Pascals

• Hertz

• Degrees

What does the period of a wave describe?

• The amplitude of the wave

• The time it takes to complete one cycle

• The speed of the wave

• The distance a wave travels

What effect does doubling the frequency of a sound have on its pitch?

• No change to the pitch

• Increases the pitch by one octave

• Decreases the pitch by one octave

• Increases the pitch by two octaves

Which of the following is NOT a correct representation of the human audible frequency range?

• 1 Hz to 1000 Hz

• All of the above are correct

• 20 cycles per second to 20,000 cycles per second

• 20 Hz to 20 kHz

How do you calculate the wavelength of a sound wave?

• Frequency multiplied by speed of sound

• Speed of sound divided by frequency

• Frequency divided by period

• Amplitude multiplied by frequency

What unit is used to measure amplitude in scientific studies?

• Hertz

• Degree

• Pascal

• Decibel

What does adding six decibels do to the sound pressure level?

• Halves it

• Increases it by a factor of ten

• Doubles it

• Reduces it by a quarter