Home
Class 12
BIOLOGY
Decibel (dB) is a standard abbreviation ...

Decibel (dB) is a standard abbreviation used for the quantitative expression of

A

The density of bacteria in a medium

B

A particular pollutant

C

The dominant Bacillus in a culture

D

A certain pesticide

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Text Solution: 1. **Understanding Decibel (dB)**: The term "decibel" is a standard unit of measurement used to express the intensity of sound. It is a logarithmic unit that quantifies the ratio of a particular sound level to a reference level. 2. **Quantitative Expression of Sound Level**: Decibels are specifically used for the quantitative expression of sound levels. This means that dB provides a way to measure how loud a sound is in comparison to a reference sound level. 3. **Higher dB Indicates Higher Sound Level**: The scale of decibels is such that a higher dB value corresponds to a higher sound level. For example, a sound measured at 80 dB is significantly louder than a sound measured at 60 dB. 4. **Measurement of Loudness**: Decibels are used to measure the relative loudness of sounds. This measurement helps in understanding how sounds can be perceived by the human ear and how they can contribute to noise pollution. 5. **Relation to Noise Pollution**: Since decibels measure sound intensity, they are also used to assess noise pollution. Higher dB levels indicate greater sound intensity, which can lead to adverse effects on health and well-being due to excessive noise exposure. 6. **Conclusion**: In summary, decibels (dB) are a standard abbreviation used for the quantitative expression of sound levels, indicating the relative loudness of sounds and serving as a measure for assessing noise pollution.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS (FOR AIIMS ASPIRANTS))|9 Videos
  • ENVIRONMENTAL ISSUES

    ICSE|Exercise REVIEW QUESTIONS|10 Videos
  • ECOSYSTEMS

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS (FOR AIIMS ASPIRANTS))|14 Videos
  • EVOLUTION

    ICSE|Exercise COMPETITION CORNER (Assertion and Reason Type Questions (For AIIMS aspirants))|26 Videos

Similar Questions

Explore conceptually related problems

dB is a standard abbreviation used for the quantitaive expression of :

Quantitative estimatin of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Q. Dumas and Kjeldahl's method are used for the quantitative estimation of

Quantitative estimatin of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Q. Liebig's combustion method is used for the quantitative estimation of :

Quantitative estimatin of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Q. Carius method is used for the quantitative estimation of:

Find the mean and standard deviation using short cut method

Quantitative estimatin of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Q. In carius method for the quantitative estimation of phosphorous by using magnesia mixture, phosphorous is estimated by:

Quantitative estimation of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Ques. In the quantitative estimation of oxygen by using I_2O_5 . The formula used is............. Where W is the mass of CO_2 and w is the mass of the compound.

Find the standard deviation by using 20 as assumed mean.

Quantitative estimation of C,H and extra elements (e.g., N.S.P., and halogens) is carried out by Liebig's combustion, Carius, Dumas, and Kjeldahl's method. Q. In the quantitative estimation of phosphorous by using ammonium molybdate, the formula used is: Where W is the mass of ammonium phosphomolybdate and w is the mass of the compound.

(a) What are the characteristics of stationary wave? (b) Derive an expression for the stationary wave using the expression prove that there is no transfer of energy in a stationary wave.

ICSE-ENVIRONMENTAL ISSUES-COMPETITION CORNER (OBJECTIVE TYPE QUESTIONS)
  1. SO(2) pollution is indicated by

    Text Solution

    |

  2. CO(2), CH(4), N(2)O and CFCs are called green house gases because they...

    Text Solution

    |

  3. Decibel (dB) is a standard abbreviation used for the quantitative expr...

    Text Solution

    |

  4. The two gases making highest ralative contribution to the greenhouse g...

    Text Solution

    |

  5. What is the function of ozone in the upper atmosphere ?

    Text Solution

    |

  6. Given pie-diagram represents the relative contribution of various GHGs...

    Text Solution

    |

  7. Increase in concentration of the toxicant at successive trophic levels...

    Text Solution

    |

  8. Eutrophicated lake has BOD

    Text Solution

    |

  9. ESP is to arrest

    Text Solution

    |

  10. If a water body is contaminated with a toxicant, its biomagnifi...

    Text Solution

    |

  11. Which one of the following disease is related to cadmium pollution?

    Text Solution

    |

  12. Lichens are

    Text Solution

    |

  13. The natural ageing of a lake is called biomagnification.

    Text Solution

    |

  14. Eutrophication causes

    Text Solution

    |

  15. Which of the following is mainly produced by the activity of anaerobic...

    Text Solution

    |

  16. Which one of the following statement is wrong in case of Bhopal traged...

    Text Solution

    |

  17. High value of BOD (Biochemical Oxygen Demand) indicates that

    Text Solution

    |

  18. Rachel Carson's famous book 'Silent Spring' is related to

    Text Solution

    |

  19. The UN conference of Parties on climate change in the year 2012 was he...

    Text Solution

    |

  20. Depletion of which gas in the atmosphe~e can lead to an increased inci...

    Text Solution

    |