5 Written questions
5 Matching questions
- How do you use a sound level meter in the clinic?
- Why does minimum amplitude level in decibels get higher as you go left to right to the higher Fo's?
- Loudness is influenced by what?
- What is acoustic power?
- When doing research and publishing it is important to state these 2 things.
- a as a biofeedback tool; measure clients speech intensity while they're talking and then give them feedback that will help them aim for a particular target (higher or lower depending on their need)
- b *how much energy is radiated
*it is measured in watts
*represents the amount of energy transfer in a given amount of time
- c frequency and spectrum
- d *that they used dB SPL
*the distance of the sound level meter from the speaker
- e Fo increases tend to be associated with amplitude increases due to physiological reasons
5 Multiple choice questions
- relative measures as long as you're comparing like with like
- making a connection between somebody's perceptual response or experience to a physical measure that links the two parameters together
- 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
- measures intensity in decibels
- because values in watts are too cumbersome
5 True/False questions
Decibels are a logarithmic measure of what? → intensity
What is the inverse square law? → by the human listener
cannot be measured by equipment
Ideas to keep in mind when using VRP in practice are: → it allows us to span a wide range of intensitites using numbers that aren't absolutely enormous or totally minuscule.
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
What complicates our perception of loudness? → Our hearing is not equally sensitive to all frequencies; it is heavily influenced by the frequency that we are listening to