1 / 12

Understanding the Doppler Effect: Sound Waves and Motion

Learn about the Doppler Effect and its impact on sound waves in this lesson. Explore how the frequency and perceived pitch change based on relative motion between the source and the observer.

mariafreeman
Download Presentation

Understanding the Doppler Effect: Sound Waves and Motion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Do Now – Answer on your Do Now SheetSilently and Independently (Really) • A fire truck has it’s siren blaring. It drives towards you and then passes you. What happens to the sound AS IT DRIVES PAST? • Take out your Mechanical Waves notes packet

  2. Which Way Did That Thing Go? 5.1.5 Sound & Doppler Effect

  3. Bell in a Jar.

  4. Sound Waves in Gas, Water, Liquid

  5. Sound Facts • Sound is transmitted as a LONGITUDINAL wave. • Sound is a mechanical wave so it requires A MEDIUM TO BE TRANSMITTED. • Speed of sound in… • air: 331 m/s • sea water: 1435m/s • steel: 5100 m/s • Amplitude of a sound wave is synonymous with VOLUME, LOUDNESS, INTENSITY

  6. Changing Sound?

  7. Phenomenon #5 – Doppler Effect • A source sends out waves in all directions with the same frequency and wavelength. • How the wave is perceived by an observer depends on RELATIVE MOTION of the source and/or observer.

  8. Phenomenon #5 – Doppler Effect Same frame of reference (no relative motion) FREQ. OBSERVED (FOBS) = SOURCE FREQ.(FSOURCE) A B

  9. Phenomenon #5 – Doppler Effect Getting closer together – FOBS > FSOURCE … at increasing speed – GETTING HIGHER … at decreasing speed – GETTING LOWER Getting farther apart – FOBS < FSOURCE … at increasing speed – GETTING LOWER … at decreasing speed – GETTING HIGER A B

  10. Doppler Constant Speed Doppler Changing Speed

  11. Mini-Whiteboards What differences did you hear in the constant speed v.s. increasing speed Doppler Effect?

  12. End of 5.1.5 - PRACTICE

More Related