sound

• Audible Frequency is between 20Hz to 20,000 Hz
• Pitch


  The sensation of the frequency of a sound
• Infrasonic sound waves are below 20 Hz
• How humans produce sound

  Our ear detects sound waves when vibrating air particles cause our eardrum to vibrate
• If the amplitude of a sound wave is large, then the loudness of sound will be more
• Sound


  A type of energy made by vibrations
• Sound "quality" or "timbre" describes those characteristics of sound which allow the ear to distinguish sounds which have the same pitch and loudness
• Frequency


  The number of waves (cycles) per given time
• Soundwaves

  • Longitudinal waves
  • Sinusoidal waves with definite frequency, amplitude, and wavelength
• How sound is produced

  When an object vibrates, it causes movement in surrounding air molecules.
• Ultrasonic sound waves are above 20,000 Hz
• Timbre


  A general term for the distinguishable characteristics of a tone
• Sound requires a medium to travel
• Amplitude


  The loudness or the amount of maximum displacement of vibrating particles of the medium from their equilibrium position when the sound is produced