Sound level meter

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/sound-level-meter

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific principle?Converts sound pressure fluctuations into electrical signals via microphone diaphragm displacement
2. What is the measurement standard?IEC 61672-1:2013 specifies functionality and performance
3. How does a sound level meter measure sound?It has a microphone that vibrates when sound hits it. The vibration changes a tiny capacitor, turning the sound into an electrical signal. The meter then shows the level in decibels.
4. Why do sound level meters use decibels?Decibels let us compare very loud and very quiet sounds on a single scale. They use a logarithmic conversion so that each step means a ten‑fold change in sound pressure. This makes it easier to see how loud something is.

Sound Pressure: The force exerted by sound waves on a surface, measured in Pascals (Pa).
Logarithmic Scale: A scale where equal distances represent multiplicative factors, used for decibels to manage wide ranges of sound intensity.
Frequency Weighting: Filters applied to sound measurements (e.g., dBA, dBC) to simulate human hearing sensitivity at different frequencies.