
Understanding Decibels and Power Ratios

Interactive Video
•
Physics, Science, Mathematics
•
9th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the threshold of hearing in micropascals?
40 micropascals
30 micropascals
20 micropascals
10 micropascals
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do decibels help in dealing with the wide range of sound pressure levels?
By converting them to a smaller set of numbers
By making them inaudible
By eliminating the need for measurement
By increasing the range
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a 10 decibel increase represent in terms of sound pressure?
No change in sound pressure
A halving of sound pressure
A tenfold increase in sound pressure
A doubling of sound pressure
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the power ratio for a 3 decibel change?
20 to 1
10 to 1
5 to 1
2 to 1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In electronics, what does a 10 decibel change indicate?
A 5 to 1 power ratio
A 2 to 1 power ratio
A 20 to 1 power ratio
A 10 to 1 power ratio
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many decibels represent a 1000 to 1 power ratio?
40 decibels
10 decibels
20 decibels
30 decibels
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If an amplifier has a gain of 6 decibels, what is the power ratio?
2 to 1
4 to 1
6 to 1
8 to 1
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