Question
Download Solution PDFThe unit of sound is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 3 i.e. Decibel (dB)
- The sound that is perceptible by humans has frequencies from about 20 Hz to 20,000 Hz.
- Hertz (Hz) is the SI unit of Frequency.
- Speed of Sound in dry air at 20 °C is 343m/s.
- Wave numbers are usually measured in units of reciprocal metres m^-1or reciprocal centimetres cm^-1.
- Permissible noise level in India.
-
Zone Permissible noise level standards in the daytime (dB) Permissible noise level standards at night (dB) Industrial Zone 75 70 Commercial Zone 65 55 Residential Zone 55 45 Silent Zone 50 40
Last updated on Jun 13, 2025
-> BPSC AE 2025 exam date has been revised. The exam will be conducted on July 17, 18 & 19 now.
-> Candidates who were facing technical issues while filling form can now fill the BPSC AE application form 2025 without any issue.
->BPSC AE age limit 2025 has been revised.
->BPSC AE application form 2025 was released on April 30. The last date to fill BPSC AE form 2025 was May 28.
->BPSC AE interview call letters released for Advt. 32/2024.
->BPSC AE notification 2025 has been released.
->A total of 1024 vacancies are announced through BPSC AE recruitment 2025
->The BPSC Exam Calendar 2025 has been released for the Assistant Engineer Recruitment.
-> The selection will be based on a written exam and evaluation of work experience.
-> Candidates with a graduation in the concerned engineering stream are eligible for this post.
-> To prepare for the exam solve BPSC AE Previous Year Papers. Also, attempt the BPSC AE Civil Mock Tests.