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5 Written questions

5 Matching questions

  1. The amplitude of the signal can be easily _____ _____.
  2. At which range do our ears have substantially less sensitivity to sound?
  3. What range do our ears have the greatest sensitivity to sounds?
  4. When doing research and publishing it is important to state these 2 things.
  5. How is intensity defined?
  1. a *that they used dB SPL
    *the distance of the sound level meter from the speaker
  2. b the middle range around 1000 Hz
  3. c WATTS divided by a unit area
    *if you take the amount of energy that a stereo is giving out and divide it across the surface of a sphere you see that there's less energy availabe per unit area as that sphere gets larger
    *it is simply spread out over a larger surface
  4. d very low frequencies and very high frequencies
  5. e defined mathematically

5 Multiple choice questions

  1. the amount of energy that can be transferred by the system
    *in the case of a music system, the energy comes from a battery or from the electrical wall socket and the output from this system is acoustic energy
  2. the signal goes up and down in it's amplitude all the time so it is constantly changing.
  3. 1st: take all of the values + and - of the signal and square them
    2nd: get the average of the squared values (it will be +)
    3rd: get the square root of the average which then gives you the RMS
  4. root mean square
  5. Voice Range Profile: measures dynamic range; from lowest to highest intensity across a person's (dB range) Fo range

5 True/False questions

  1. What is the general principle of the inverse square law?to specify exactly how the intensity of sound diminishes as the hearer/recorder gets further away form the speaker/sound source

          

  2. What complicates our perception of loudness?the amount of energy that can be transferred by the system
    *in the case of a music system, the energy comes from a battery or from the electrical wall socket and the output from this system is acoustic energy

          

  3. What is the benefit of a logarithimic scale?it is capable of accomodating a large range of numbers in a very straight forward and visually intuitive way

          

  4. How is loudness judged?by the human listener
    cannot be measured by equipment

          

  5. Why do we use logarithimic numbers and decibels?intensity

          

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