A noise level of 100 decibel would correspond to
- AOption (a)
just audible sound
- BOption (b)
ordinary conversation
- COption (c)
sound from a noisy street
- DOption (d)
noise from a machine shop
- EOption (e)
None of the above/More than one of the above
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Correct answer
noise from a machine shop
Why this answer is correct
The correct answer is noise from a machine shop.
Key Points
- Decibel
- It l is the unit of sound. Its symbol is ‘dB’.
- It is defined as a unit of measurement used to express the ratio of one value of a power or field quantity to another on a logarithmic scale, the logarithmic quantity being called the power level or field level, respectively.
- It is widely known as a measure of sound pressure level.
- It is used to express the ratios of power or amplitude in arithmetic ratios in electronics.
- The sound level of 100dB will fall into the category of noisy sounds coming from a machine shop. Hence option 4 is correct.
Additional Information
- 0-30 dB: Most human adults can’t hear sounds under 0 decibels. Most sound within this range is practically inaudible. Sounds that produce decibel levels between 0 and 30 comprise whispers as well as the ticking of a watch.
- 31-45 dB: It is the decibel level of silent sounds. Within this variety, sounds are audible but you will have difficulty differentiating them from other noises if you’re somewhere noisy. Soft dialog (like that which you may notice from a library) drops to the 30-45 decibel range.
- 46-65 dB: Standard conversation, the sound of a bubbling flow, along with also the meow of your kitty may generate sound that drops from the 45-65 decibel range.
- 66-90 dB: A lot of your favorite handheld gadgets, by electrical beard trimmers into blenders, drop at the 70 to 90 range.
- 91-100 dB: This is all about the level at which you’re want to add some earplugs. Cars without a muffler and gas-powered lawnmowers sit in the 90 to the 100-decibel range.
- 101-125 dB: 110 decibels and above is the level where other sounds can not truly be heard. Aircraft takeoff, trains, and quite loud concerts would fall to the 110+ decibel level.
- 126+ dB: 125 decibels is where sound really begins to get painful. Now, you’re basically talking about weaponized audio. This is the noise level of a rocket ship taking off.