Answer
438.3k+ views
Hint: Sound is a form of energy and the sound intensity is a measurement take we take from what we hear,
Sound loudness is not necessarily the sound that enters the human ear, but it also tells of human ear sensitivity sensing the energy.
Complete step by step solution:
Loudness of sound is generally measured in decibel. The short form of decibel is written as ${\text{dB}}$.
One decibel is ten times the power-ratio of common logarithm. $1\,{\text{dB}}$ sound is very difficult to hear. No one can hear it if another sound is present in the background. It can only be heard with the help of a sine wave.
Sound loudness also depends on several variables such as pitch, sound emission size, ear response etc. The intensity of decibel may not remain the same on water and air. Decibel is not measured on a standard linear scale like other units. It is based on order of magnitudes. Decibel is mostly used in electronics.
Hence, option A is correct.
Option B is incorrect because ${\text{Hz}}$ or Hertz is a unit used for measuring frequency. It cannot be used to measure intensity of sound.
Option C is also incorrect because Watt is the unit of power.
Option D is not correct because Joule is the unit used to measure energy.
Note: Many people get confused because decibel may be used to describe power or intensity of other things also. Actually decibel is not like the common unit. It is a unit based on common logarithms. It is a way of relating a ratio on a scale. That ratio may be power or loudness of sound also.
Sound loudness is not necessarily the sound that enters the human ear, but it also tells of human ear sensitivity sensing the energy.
Complete step by step solution:
Loudness of sound is generally measured in decibel. The short form of decibel is written as ${\text{dB}}$.
One decibel is ten times the power-ratio of common logarithm. $1\,{\text{dB}}$ sound is very difficult to hear. No one can hear it if another sound is present in the background. It can only be heard with the help of a sine wave.
Sound loudness also depends on several variables such as pitch, sound emission size, ear response etc. The intensity of decibel may not remain the same on water and air. Decibel is not measured on a standard linear scale like other units. It is based on order of magnitudes. Decibel is mostly used in electronics.
Hence, option A is correct.
Option B is incorrect because ${\text{Hz}}$ or Hertz is a unit used for measuring frequency. It cannot be used to measure intensity of sound.
Option C is also incorrect because Watt is the unit of power.
Option D is not correct because Joule is the unit used to measure energy.
Note: Many people get confused because decibel may be used to describe power or intensity of other things also. Actually decibel is not like the common unit. It is a unit based on common logarithms. It is a way of relating a ratio on a scale. That ratio may be power or loudness of sound also.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)