1. Explain how sound is produced by your school bell.
2. What is the audible range of the average human ear?
3. What is sound and how is it produced?
Answers
Explanation:
1. When the school bell is struck with a hammer, the hammer hits the gong again and again that causes compressions and rarefactions in the air. These vibrations travel in the air in the form it starts vibrating and as a result sound is produced in the bell.
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2. about 20 Hz to 20 kHz
Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz. (Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high-frequency sensitivity as they mature; the upper limit in average adults is often closer to 15–17 kHz.)
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3. Sound is a type of energy made by vibrations. When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well. This makes them bump into more nearby air molecules.
Answer:
1. The sound produced by the school bell is dependent on how the bell vibrates when it is hit—the particles of the medium start to vibrate when the bell is hit physically or mechanically. ... The continuous formation of compression and rarefaction makes the sound of the school bell propagate through the air.
2. Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz. (Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high-frequency sensitivity as they mature; the upper limit in average adults is often closer to 15–17 kHz.)
3. Sound is a type of energy made by vibrations. When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well.