COMD 5070 Exam 3 (Latest 2023/ 2024 Update) Acoustics of Speech and Hearing| Questions and Verified Answers| 100% Correct| Grade A
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COMD 5070 Exam 3 (Latest 2023/ 2024 Update) Acoustics of Speech and Hearing| Questions and Verified Answers| 100% Correct| Grade A
COMD 5070 Exam 3 (Latest 2023/ 2024
Update) Acoustics of Speech and Hearing|
Questions and Verified Answers| 100%
Correct| Grade A
Q: How to calculate frequency? If there is a period of 2ms (0.002 seconds)?-
Answer:
1/0.002= 500 Hz.
Q: What is a harmonic series?
Answer:
When multiple sine waves or pure tones are combines together.
Q: What are integer multiples?
Answer:
The whole number multiples of whatever the fundamental frequency is.
Q: What is the fundamental frequency?
Answer:
The lowest frequency in a series that we will combine to make a harmonic series.
Q: How does sound transmit when the medium changes?
Answer:
-Sound will travel the most readily through a medium that is continuous, that does not change in
its properties from one place to another.
- Air is a medium.
- Air molecules oscillate with sound.
- Energy transmits through similar mediums.
- Change of medium will change if the sound is reflected or transmitted.
- Talking to a submerged swimmer: medium changed & now you have to speak up, more sound
is being reflected than transmitted.
- Reflection can happen where tube size changes.
Q: How are decibels added?
Answer:
You always go up 6 dB when you add two identical intensities.
Q: What is 20 dB + 20 dB?
Answer:
26 dB.
Q: What is 50 dB + 50 dB?
Answer:
56 dB.
Q: What is an octave?
Answer:
A doubling of Hz.
Q: How many semitones are there per octave?
Answer:
12.
Q: What is happening when you go from 400 Hz to 800 Hz?
Answer:
Going up one octave.
Q: What happens when you go up and down octaves?
Answer:
The mathematical relationship between the frequency changes.
Q: Note pairs blend one of two ways. What are these two ways?
Answer:
- Harmonious- ly.
- Dissonantly.
Q: If there are 12 semitones between 100 Hz and 200 Hz, how many semitones would there be
between 500 Hz and 4000 Hz?
Answer:
- You first have to determine how many octaves there are, then multiply by 12 to get the
semitones.
- 36.
Q: What are the three things one should know about the 12 notes between octaves?
Answer:
- Each step in nonlinear.
- Each step upward is bigger than the last (about 5.9% higher in frequency).
- No two semitones are identical; however, they sound equal in step size.
jordancarter 7 months ago
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