5 Written Questions
5 Matching Questions
- At which range do our ears have substantially less sensitivity to sound?
- What type of characteristic is loudness and what does it correlate to?
- What does RMS represent?
- What is acoustic power?
- What is the challenge of measuring the microphone signal of a person's voice?
- a the signal goes up and down in it's amplitude all the time so it is constantly changing.
- b a perceptual characteristic
- c *how much energy is radiated
*it is measured in watts
*represents the amount of energy transfer in a given amount of time
- d very low frequencies and very high frequencies
- e the amplitude of the signal
5 Multiple Choice Questions
- relative measures as long as you're comparing like with like
- measures intensity in decibels
- making a connection between somebody's perceptual response or experience to a physical measure that links the two parameters together
- *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
- 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
5 True/False Questions
Why do we use logarithimic numbers and decibels? → because values in watts are too cumbersome
What happens as the radius gets bigger? → converts electrical energy into acoustic energy
*a home stereo is a transducer
What can RMS be applied to? → the amplitude of the signal
What is the inverse square law? → by the human listener
cannot be measured by equipment
What is RMS? → root mean square