Question:
Fill in the blanks with suitable words.- Time taken by an object to complete one oscillation is called ___ .
- Loudness is determined by the ___ of vibration.
- The unit of frequency is ___.
- Unwanted sound is called __________ .
- Shrillness of a sound is determined by the ___ of vibration.
Fill in the blanks with suitable words.
- Time taken by an object to complete one oscillation is called ___ .
- Loudness is determined by the ___ of vibration.
- The unit of frequency is ___.
- Unwanted sound is called __________ .
- Shrillness of a sound is determined by the ___ of vibration.
Updated On: Dec 4, 2023
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Solution and Explanation
(a) Time taken by an object to complete one oscillation is called time period.
(b) Loudness is determined by the amplitude of vibration.
(c) The unit of frequency is hertz (Hz).
(d) Unwanted sound is called noise.
(e) Shrillness of a sound is determined by the frequency of vibration.
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Concepts Used:
Sound
Sound is a vibration that propagates the mechanical wave of displacement and pressure, through a medium can be of any matter. In other words, the sound is the thin line between Music sound and Noise.
Types of Sounds:
Sound can be divided into two types depending on its frequency. The following are:-
Infrasonic Waves:
- Infrasonic waves have a frequency lower than 20 Hz. Since it is below the human hearing range, it is inaudible to humans.
- However, several other living organisms use these waves to communicate, whales, sharks, elephants, hippopotamus, etc. these waves are also used in the scientific field, it is used to study upcoming earthquakes, volcanic eruptions, human heart rates, rock formation stages, etc.
Ultrasonic waves:
- Ultrasonic waves have a frequency higher than 20 kHz. Since it is above the human hearing range, it is inaudible to humans.
- These waves are used in the scientific field, it is used to study human heart rates, to take sonograms, navigation of directions, imaging things, uniform sample mixing, communication, testing of samples, etc.