Quizlet Sound Vocab

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  1. beat frequency: # of max intensity points that occur per second
  2. beats: periodic changes in sound intensity
  3. consonants: combo of pleasing musical notes
  4. decibel: unit used to measure the intensity of sound
  5. diatonic effect: the 8 note scale based on experiences and multinational theory
  6. diffraction: ability of waves to move around an obstacle
  7. dissonance: combo that have harsh effect
  8. Doppler effect: an apparent change in the frequency of a wave due to the motion of the observer or the source of the wave. Can be used to measure the speed of an object
  9. echo sounder: measures depth of sea
  10. echos: when sound is reflected and heard by transmitters
  11. fundamental mode: the string vibrates in one segment
  12. harmonies: when the string vibrates in multiples of fundamental frequencies
  13. hershal tube: apparatus used to demonstrate interference of sound waves
  14. infrasonic: frequencies less than 20hz
  15. Mach Number: used to measure speeds for supersonic aircraft
  16. music: combonations of musical notes that originate from a source vibrating in a uniform manner w/ constance frequency
  17. noise: sound with vibrations that are constantly changing frequency
  18. objective: dependent on external evidence and not on thoughts or feelings
  19. overtones: the string vibrates in more than one segment
  20. parabolic microphones: used to pick up remote sound
  21. pitch: term often used to substitute for frequency in music
  22. quality: depends on the # and relative intensity of the overtones it produces
  23. radar: uses radio waves instead of sound
  24. refraction: bending of waves at an angle from one medium to another
  25. revertibration: when echos so closely behind the original that the original appears prolonged
  26. revertibration time: the time required for sound of a standard intensity to die away and become inaudible
  27. sonar: used to find flaws in solid objects, diagnose brain damage, detect breast cancer, and ultrasound
  28. sonic boom: when sound waves left behind an aircraft interfere constructively producing large compressions and rarefactions
  29. sound: stimulation of the auditory nerve in the human ear
  30. sound barriers: when wavefronts pile up and produce an area of very dense air or an intense compression
  31. subjective: dependent on the individuals point of view
  32. ultrasonic: frequencies > 20000hz