14.4 sound behavior and the doppler...

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14.4 Sound Behavior and the Doppler Effect PHYSICS 1 May 01, 2019 PRACTICE LABS TESTS Practice Problems (113) Wave Interactives Unit 14 Test Thursday (5/2/19) Properties and Detection of Sound 14.4 I can define, analyze, and solve problems involving sound behavior. Refraction Sound waves bend when parts of the wave fronts travel at different speeds. This bending of sound is called refraction. Beats When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud a phenomenon which is called "beating" or producing beats. Sound Waves

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Page 1: 14.4 Sound Behavior and the Doppler Effectbroncphysics.weebly.com/uploads/2/3/3/4/23345212/14.4_sound_be… · 14.4 Sound Behavior and the Doppler Effect PHYSICS 1 May 01, 2019 PRACTICE

14.4 Sound Behavior and the Doppler Effect

PHYSICS 1

May 01, 2019

PRACTICE LABS TESTS

Practice Problems (1­13) • Wave Interactives

Unit 14 Test Thursday (5/2/19)

Properties and Detection of Sound

14.4I can define, 

analyze, and solve problems 

involving sound behavior.

RefractionSound waves bend when parts of the wave fronts travel at different speeds.  This bending of sound is called refraction.

BeatsWhen two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud ­ a phenomenon which is called "beating" or producing beats. 

Sound Waves

Page 2: 14.4 Sound Behavior and the Doppler Effectbroncphysics.weebly.com/uploads/2/3/3/4/23345212/14.4_sound_be… · 14.4 Sound Behavior and the Doppler Effect PHYSICS 1 May 01, 2019 PRACTICE

14.4 Sound Behavior and the Doppler Effect

PHYSICS 1

May 01, 2019

Sound Waves The Doppler EffectThe Doppler Effect describes the change in frequency of a wave for an observer moving relative to the source of the wave.

The Doppler Effect

d ­ detectors ­ source

= (524 Hz) (         )343 m/s ­ 0343 m/s ­ 24.6 m/s

= 564 Hz

5. A trumpet player sounds C above middle C (524 Hz) while traveling in a convertible at 24.6 m/s. If the car is coming toward you, what frequency would you hear?  Assume that the temperature is 20°C.

In­Class Problem

The Doppler Effect The Doppler Effect

Page 3: 14.4 Sound Behavior and the Doppler Effectbroncphysics.weebly.com/uploads/2/3/3/4/23345212/14.4_sound_be… · 14.4 Sound Behavior and the Doppler Effect PHYSICS 1 May 01, 2019 PRACTICE

14.4 Sound Behavior and the Doppler Effect

PHYSICS 1

May 01, 2019

Problems (14-17)