The denser the material is, the faster a sound wave can move Sound waves travel at different speeds in different materials. Waves, the speed of a sound wave depends on the material in Recall that sound wavesĬan also travel through liquids and solids. Speed of Sound Sound waves traveling through air cause Reflect sound waves in different directions to fill the space.Ĭars, computers Reading Essentials Introduction to Waves 13 The stage has a woodenįloor to improve vibrations. Engineers carefully choose the shapesĪnd materials to control sound waves. Interactions of sound waves into account when they areĭesigning a concert hall. Without transmission we would not hear sound waves on theĮngineering Connection Acoustical engineers must take Mechanical waves can also travel through liquids and gases. The sound from a cell phone in theįigure above transmits easily through an uninsulated wall. Transmit some of the energy to the other side of the barrier and The matter does not absorb all the energy. Transmission Sometimes when a wave interacts with matter, Sound from the cell phone is absorbed by the insulation in the The amount of energy absorbed depends on the type of waveĪnd the material in which it moves. Permission is granted to reproduce for classroom use. “sound” 12 Introduction to Waves Reading Essentials LESSON 2Ĭopyright © McGraw-Hill Education. You’ve read this lesson, reread the statements to see if you have Place an A in the BeforeĬolumn if you agree with the statement or a D if you disagree. What do you think? Read the two statements below and decide Absorption is the transfer of energy by a wave to the
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As waves travel through matter, the energy they carryĭecreases. Waves travel in air, some of their energy transfers to particles in When waves reflect from a surface, theyĬhange direction like a basketball bouncing off a surface.Ībsorption When you shout, you create sound waves. When you dropĪ basketball at an angle, it bounces up at the same angle but in Reflection causes waves to change direction. Ocean waves reflect off boats, islands, and piers. An echo is an example of a sound wave reflecting. Reflection is theīouncing of a wave off a surface.
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