Sound Waves Study Guide

Front

What is the definition of amplitude in a sound wave?

Back

Amplitude is the maximum displacement of points on a wave from the rest position, which relates to the loudness of the sound.

Front

How is frequency defined in the context of sound waves?

Back

Frequency is the number of cycles of a wave that occur in a unit of time, typically measured in Hertz (Hz). It determines the pitch of the sound.

Front

What effect does temperature have on the speed of sound in a medium?

Back

Sound waves travel slower in colder mediums because the molecules are less energetic and move more slowly.

Front

What is an echo and how does it occur?

Back

An echo is a reflection of sound that arrives at the listener after a delay, occurring when sound waves bounce off surfaces.

Front

What is the resting point in a wave?

Back

The resting point is the equilibrium position of the wave, where the medium would be if there were no wave passing through.

Front

What is the relationship between wavelength and frequency in sound waves?

Back

Wavelength is inversely proportional to frequency; as frequency increases, wavelength decreases, and vice versa.

Front

What is the speed of sound in air at room temperature?

Back

The speed of sound in air at room temperature (20°C) is approximately 343 meters per second.

Front

How does the medium affect the speed of sound?

Back

Sound travels faster in solids than in liquids, and faster in liquids than in gases due to the density and elasticity of the medium.

Front

What is the formula for calculating the speed of sound?

Back

The speed of sound can be calculated using the formula: speed = frequency × wavelength.

Front

What is the difference between constructive and destructive interference of sound waves?

Back

Constructive interference occurs when two waves combine to make a larger amplitude, while destructive interference occurs when they combine to reduce amplitude.