COMD 5070 Exam 3 (Latest 2024 / 2025 Update) Acoustics of Speech and Hearing | Questions and Verified Answers | 100% Correct | Grade A - Utah
Question:
How to calculate frequency? If there is a period of 2ms (0.002 seconds)?
Answer:
1/0.002= 500 Hz.
Question:
What is a harmonic series?
Answer:
When multiple sine waves or pure tones are combines together.
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Question:
What are integer multiples?
Answer:
The whole number multiples of whatever the fundamental frequency is.
Question:
What is the fundamental frequency?
Answer:
The lowest frequency in a series that we will combine to make a harmonic series.
Question:
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. 2 / 4
Question:
How are decibels added?
Answer:
You always go up 6 dB when you add two identical intensities.
Question:
What is 20 dB + 20 dB?
Answer:
26 dB.
Question:
What is 50 dB + 50 dB?
Answer:
56 dB.
Question:
What is an octave?
Answer:
A doubling of Hz.
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Question:
How many semitones are there per octave?
Answer:
12.
Question:
What is happening when you go from 400 Hz to 800 Hz?
Answer:
Going up one octave.
Question:
What happens when you go up and down octaves?
Answer:
The mathematical relationship between the frequency changes.
Question:
Note pairs blend one of two ways. What are these two ways?
Answer:
- Harmoniously.
- Dissonantly.
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