At What Level A Sound Becomes Physical Pain Mcq?

What is noise * Mcq?

This set of Energy & Environment Management Multiple Choice Questions & Answers (MCQs) focuses on “Noise Pollution and its Effects”.

1.

Explanation: Noise is defined as an undesirable and unwanted sound..

What is the best way to reduce aircraft noise?

Efficient aircraft acoustic engineering is the single most effective countermeasure to reduce aircraft noise pollution. And its importance will only increase with the advent of the next-generation aircraft.

At what level a sound becomes physical pain *?

Threshold of Pain. The level of sound at which the listener begins to feel physical pain. This occurs between approximately 115 and 140 dB.

What is the permissible noise limit of 120 dB in minutes?

Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

Who has minimum frequency?

Explanation: When compared to the voices of a baby boy, baby girl, and woman, the voice of a man has a lower pitch. As the pitch of a man is low, which is proportional to the frequency of a sound, the man’s voice is of minimum frequency as compared with others. 3.

What noise is white noise?

White noise is random noise that has a flat spectral density — that is, the noise has the same amplitude, or intensity, throughout the audible frequency range (20 to 20,000 hertz). White noise is so named because it’s analogous to white light, which is a mixture of all visible wavelengths of light.

Which pollution causes hearing loss in organisms?

Noise pollution can cause health problems for people and wildlife, both on land and in the sea. From traffic noise to rock concerts, loud or inescapable sounds can cause hearing loss, stress, and high blood pressure.

What are the 5 types of pollution?

There are different types of pollution: water pollution, air pollution, solid waste pollution and noise pollution. All of these can be found in urban areas. The main sources of pollution are household activities, factories, agriculture and transport.

How many decibels can kill you?

150 decibels is usually considered enough to burst your eardrums, but the threshold for death is usually pegged at around 185-200 dB. A passenger car driving by at 25 feet is about 60 dB, being next to a jackhammer or lawn mower is around 100 dB, a nearby chainsaw is 120 dB.

Which gets less affected by noise Mcq?

3. Which gets less affected by noise? Explanation: Error detection is less affected by noise.

Which of the following sound is pleasant to our ears *?

musicThe sound which is unpleasant for our ears is called noise while music is the sound which is pleasant for our ears. Music becomes noise sometimes when it crosses the bearable range of sound for our ears. Q. 9.

What are the 3 main causes of noise pollution?

CAUSES OF NOISE POLLUTIONTraffic noise.Air traffic noise.Construction sites.Catering and night life.Animals.Physical.Psychological.Sleep and behavioural disorders.More items…

What can be done to reduce traffic noise?

Measures to reduce road traffic noise quieter vehicles; quieter tyres; quieter road surfaces; traffic measures (e.g. speed reduction);

How loud can a human yell?

Human screams can be quite loud, possibly exceeding 100 dB (as of March 2019, the world record is 129 dB!) —but you probably want to avoid that because screams that loud can hurt your ears! You should also have found sound levels drop off quickly as you get farther from the source.

How long can you listen to 100 dB?

Scientists recommend no more than 15 minutes of unprotected exposure to sounds that are 100 decibels. In addition, regular exposure to sounds at 110 decibels for more than one minute risks permanent hearing loss.

Can sound waves travel in vacuum?

IN SPACE, no one can hear you scream. Sound waves are travelling vibrations of particles in media such as air, water or metal. … So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

What is unwanted sound called?

Noise is unwanted sound considered unpleasant, loud or disruptive to hearing. … Acoustic noise is any sound in the acoustic domain, either deliberate (e.g., music or speech) or unintended.

Which is the best way to control noise pollution among the four fundamental ways?

2. Which is the best way to control noise pollution among the four fundamental ways? Explanation: The best control method for noise pollution is to reduce the noise levels at the source. We a noise is reduced at the source tan pollution won’t occurrence in the proceeding steps and thus it won’t affect any organisms.