Sound solving
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  • 1. SOUNDWAVESLongitudinalMechanical
  • 2. Speed of SoundMedium Temp. in Celsius Speed in m/s 0 331 1 331.6Air 2 332.2 3 332.8 4 333.4
  • 3. What have you noticed in the speed of thesound?•Every 1 degree Celsius temperature rises, add 0.6•+ 0.6 m/s for every 1 degree Celsius of air temperature increases
  • 4. Find the speed of the sound:• 10⁰C• 15⁰C• 28⁰C• 37⁰C• 39 ⁰C
  • 5. Frequency of different Notes NOTES FREQUENCY Do 256 Re Mi Fa SO La Ti Do 512 (twice of the first one)
  • 6. Solve:• On a warm day (Temp. 32 ⁰C). What is the wavelength of the note middle Do with a frequency of 256 Hz?• If on a given day, the note whose frequency is 338 Hz has a wavelength of 1.2m, what is the air temperature?
  • 7. Sound Wave PropertyProperty SoundReflection Echo, ReverberationRefraction Change of direction
  • 8. ECHO: Reflection• Reflection of Sound; Reflected on a wall• 16 m away to hear an echo; .05s to hear an echo• .1 s to hear a sound from eardrum to the brainExample: d = vtFind the distance of the echo if it travelsat a speed of 340m/s.
  • 9. Solve:• A man stands facing a cliff. The air temperature on that day is 24⁰C. He fires a riffle and hears the echo after 2.6 s. How far is he from the cliff?a. Find the velocity of the soundb. Find the distance of the man from the cliff.
  • 10. Refraction: Change of direction/speed• Sound waves are refracted away from the Earth during day time.• Sound waves are refracted towards the Earth during night time.• Sound is more audible during night time.
  • 11. Quality of Sound• Pitch and Loudness= quality (Physics)• Pitch and Volume= timbre (Music)• Quality- is that which make the sound the way it sounds• Fundamental Frequency- consists of many frequencies sounding at the same time. (vibrating string)- Many frequencies sounding at the same timein harmony.