5 Written questions
5 Matching questions
- What is the inverse square law?
- Why do we use logarithimic numbers and decibels?
- When doing research and publishing it is important to state these 2 things.
- What range do our ears have the greatest sensitivity to sounds?
- What is a VRP and what does it do?
- a describes how sound diminishes as the distance from the sound source increases
- b because values in watts are too cumbersome
- c Voice Range Profile: measures dynamic range; from lowest to highest intensity across a person's (dB range) Fo range
- d the middle range around 1000 Hz
- e *that they used dB SPL
*the distance of the sound level meter from the speaker
5 Multiple choice questions
- 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
- Fo increases tend to be associated with amplitude increases due to physiological reasons
- relative measures as long as you're comparing like with like
- the amplitude of the signal
5 True/False questions
What type of characteristic is loudness and what does it correlate to? → a perceptual characteristic
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
There are some things to keep in mind when using a sound meter level. They are: → *distance is crucial: it must be known or at least kept constant from one session to another because of the inverse square law
*keep mouth to mic distance constant
*keep input settings constant for each session
What is the great value in using a decibel scale? → it allows us to span a wide range of intensitites using numbers that aren't absolutely enormous or totally minuscule.
How do you use a sound level meter in the clinic? → measures intensity in decibels