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Sound Wave Properties

We visit a recording studio to explore the properties of sound. We explore the speed of sound as well as how our ears interpret changes in frequency and amplitude of a sound wave.

Unit 6 Segment B: Sound Waves Properties We visit a recording studio to explore the properties of sound. We explore the speed of sound as well as how our ears interpret changes in frequency and amplitude of a sound wave.

Premiere Date: July 31, 2018 | Runtime: 00:12:43

Support Materials

Learning Objectives

-Differentiate between mechanical and electromagnetic waves.

-Compare and contrast the motions of waves with respect to their direction of propagation.

-Calculate the velocity of a wave given its frequency and wavelength.

-Understand how our ears interpret changes in frequency and amplitude of sound waves.

-Discuss what factors influence the speed of sound in air.

-Describe how the decibel scale compares sounds of different magnitudes of loudness.

Toolkit

Note-Taking Guide and Questions to Consider
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Practice Problems
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Speed of Sound in Air Lab
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Vocabulary

amplitude - the distance from the equilibrium position to the maximum or minimum intensity of a wave.

decibel (dB) - a unit of measurement that represents the logarithmic ratio between a sound wave’s highest and lowest pressure.

elasticity - how quickly the molecules of a material ‘bounce back’ after a wave has moved through them.

electromagnetic wave - oscillating electric and magnetic fields that need no physical medium through which to travel.

frequency (f) - the number of wavelengths that pass a given point per second; SI unit is the Hertz (Hz).

longitudinal wave - a wave that vibrates in the direction of propagation (e.g. sound waves).

mechanical wave - a wave requiring a physical medium through which to travel.

period (T) - the time it takes for one wave cycle to occur; SI unit is seconds (s).

timbre - the quality of a sound.

transverse wave - a wave that vibrates perpendicular to the direction of propogation (e.g. electromagnetic waves).

wavelength (λ) - The distance between two waves that includes on full compression and one full rarefaction of a sound wave or one full crest and one full trough of an electromagnetic wave; SI unit is meters (m).

Georgia Standards of Excellence

SP4
Obtain, evaluate, and communicate information about the properties and applications of waves.
a
Develop and use mathematical models to explain mechanical and electromagnetic waves as a propagating disturbance that transfers energy. (Clarification statement: Mathematically describe how the velocity, frequency, and wavelength of a propagating wave are related.)
c
Construct an argument that analyzes the production and characteristics of sounds waves. (Clarification statement:Includes, but not limited to, Doppler Effect, standing waves, wavelength, the relationship between amplitude and the energy of the wave, and the relationship between frequency and pitch.)

Request Teacher Toolkit

The Physics in Motion teacher toolkit provides instructions and answer keys for study questions, practice problems, labs for all seven units of study.  GPB offers the teacher toolkit at no cost to Georgia educators. It will be available in September 2018. To preorder your teacher toolkit, complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all seven units of study.