1 / 7

Diffraction of Sound Waves By: Adams D aramy

Diffraction of Sound Waves By: Adams D aramy. Diffraction. Beam of light spread out=>passes through medium -Accompanied by interference between the wave forms produced Wave bends when it passes around an edge/through a slit

dragon
Download Presentation

Diffraction of Sound Waves By: Adams D aramy

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. Diffraction of Sound WavesBy: Adams Daramy

  2. Diffraction • Beam of light spread out=>passes through medium -Accompanied by interference between the wave forms produced • Wave bends when it passes around an edge/through a slit • Change in the direction of waves as they encounter opening/barrier in their way • More pronounced with longer wavelengths:

  3. Sound Wave • Wave of compression/rarefaction • Speed of Sound Wave (c)=wavelength/period of time -measured in meters per second • Can be heard around corners and barriers • -due to diffraction and reflection of sound

  4. Reflection of Sound Waves • Leads to either an echo or reverberation • Reverberation-Prolongation of sound; resonance • Law of Reflection: angle of incidence equals angle of reflection

  5. Sound Radiation in Woodwind Instruments-Effects of Diffraction • Standing waves in a tube, compressions/rarefactions, are longitudinal • From closed tube end, waves will be reflected > due to diffraction • Amount of diffraction depends on ratio of wavelength to bore diameter • Waves pass through large opening with minimal disturbance -large proportion of sound energy reflected from open end

  6. Acoustic Impedance Ratio of pressure fluctuation to particle velocity: Z=p/v Volume Velocity/Discharge-the particle velocity times the tube area A. Z=z/A=p/U When waves meet at open end, encounter sudden change in impedance

More Related