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5 Written questions

5 Matching questions

  1. What is the benefit of a logarithimic scale?
  2. How does RMS work?
  3. What is acoustic power?
  4. What are the physiological reasons Fo increases tend to be associated with amplitude increases?
  5. What range do our ears have the greatest sensitivity to sounds?
  1. a 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
  2. b the middle range around 1000 Hz
  3. c if you are going to sustain a very high note at a very high Fo it means that you need to activate the cricothyroid muscle to stretch the vocal folds substantially; the vocal folds would be quite stiff and in order to get them to vibrate when they are that stiff you need to apply greater pressure and this will result in higher amplitude phonation simply because it is difficult to get the vocal folds to oscillate when they are stiff; you have to drive them much harder to do so as you drive them harder it's then impossible to sustain a very soft input
  4. d it is capable of accomodating a large range of numbers in a very straight forward and visually intuitive way
  5. e *how much energy is radiated
    *it is measured in watts
    *represents the amount of energy transfer in a given amount of time

5 Multiple choice questions

  1. defined mathematically
  2. 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
  3. to specify exactly how the intensity of sound diminishes as the hearer/recorder gets further away form the speaker/sound source
  4. it allows us to span a wide range of intensitites using numbers that aren't absolutely enormous or totally minuscule.
  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. Explain why the articulators would move more for louder speech.*increase our subglottal pressure/more driving pressure for loud speech
    *it causes the vocal folds to move farther apart as they oscillate = more forceful vocal fold collisions
    *larger articulator movements
    *because more pressure has come from the lungs to drive the larynx, there is higher oral presure as you form consonants thus, the consonant burst release is stronger

          

  2. What does RMS represent?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 challenge of measuring the microphone signal of a person's voice?to specify exactly how the intensity of sound diminishes as the hearer/recorder gets further away form the speaker/sound source

          

  4. Why do we use logarithimic numbers and decibels?because values in watts are too cumbersome

          

  5. What is RMS?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