# Sound Wave Intensity/Sound Level

• threewingedfury
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.
threewingedfury
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?

As long as you are calculating the relative intensities, yes. You are correct.

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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