Sound Wave Intensity/Sound Level

In summary, sound wave intensity is a measure of the energy carried by a sound wave per unit area and is measured in decibels. The higher the intensity, the louder the sound will be perceived. Sound level, on the other hand, is a subjective measure of loudness that takes into account the sensitivity of the human ear. It is also measured in decibels and can be measured using a sound level meter. The range of sound levels that humans can hear is approximately 0 dB to 120 dB, with sounds below 0 dB being too quiet and sounds above 120 dB being potentially damaging to hearing.
  • #1
threewingedfury
29
0
The intensity of sound wave A is 100 times that of sound wave B. Relative to wave B the sound level of wave A is:
a. -2 dB
b. +2 dB
c. +10 dB
d. +20 dB
e. +100 db

Using 10logbase10(I/Io) - 10log(100/1) - Would the answer be 20 dB?
 
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  • #2
As long as you are calculating the relative intensities, yes. You are correct.
 
  • #3


Correct, the answer would be +20 dB. This is because sound level is measured on a logarithmic scale, meaning that a difference of 10 times in intensity corresponds to a change of 10 dB. In this case, since wave A has an intensity 100 times greater than wave B, the change in sound level would be 10 x log(100/1) = 20 dB.
 

1. What is sound wave intensity?

Sound wave intensity is a measure of the amount of energy carried by a sound wave per unit area. It is directly related to the amplitude, or height, of the sound wave and is typically measured in decibels (dB).

2. How does sound wave intensity affect the loudness of a sound?

The higher the intensity of a sound wave, the louder the sound will be perceived. This is because a higher intensity means that there is more energy being transmitted, resulting in a stronger vibration of the eardrum.

3. What is the difference between sound wave intensity and sound level?

Sound wave intensity is a physical measure of the amount of energy carried by a sound wave, while sound level is a subjective measure of the perceived loudness of a sound. Sound level takes into account the sensitivity of the human ear and is measured in decibels (dB).

4. How is sound level measured?

Sound level is typically measured using a device called a sound level meter. This device measures the sound pressure level in decibels (dB) and can also calculate the average sound level over a given period of time.

5. What is the range of sound levels that humans can hear?

The range of sound levels that humans can hear is approximately 0 dB to 120 dB. Sounds below 0 dB are too quiet to be heard, while sounds above 120 dB can be painful and can even cause permanent hearing damage.

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