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0 dB is the threshold of hearing. Some people can hear a very soft sound and some cannot hear anything.

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15y ago

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A sound of zero decibles cannot be heard and is considered infrasonic?

Zero decibels doesn't exist in the nature, on the earth; zero noise is any sound waves.


What is the si unit of sound intensity?

the sound intensity is measured in work /m .that means , si unit of sound intensity is decibel ( db) .


What the smallest amount of sound is that can be heard?

Zero dB is the quietest sound that may be heard by the average of a group of young men who have not been noise exposed. By definition, one half of these will be able to hear a quieter sound, and the other half will be less sensitive. Nowadays, these limits are more precisely defined in terms of physical units. Some animals hear at a different sensitivity to us, and over a different frequency range.


What is the minimum intensity a sound can have?

The minimum of sound intensity can be theoretically as low as zero decibels. But you seem to mean what the human threshold of hearing is. That reference sound intensity is 10^−12 W/m² equal to 0 dB sound intensity level. Our eardrums are moved by the sound pressure. The reference sound pressure at the human threshold of hearing is po = 20 µPa equal to 0 dB sound pressure level (SPL).


Does the frequency of a whales sound made underwater changes after being heard in air?

When a sound passes from one medium to another of different [non-zero] density, its speed and wavelength change, but its frequency doesn't. It doesn't matter what either medium is, or what source produced the sound.


Is ground zero haunted?

i have heard rumors and people have been seeing things but there isnt no evidence that it is haunted but we will find out in the future


In the story a noiseless flash how did john hersey blend fiction and nonfiction in hiroshima?

Most of the survivors did not hear the sound but did see the flash. The ones that heard it were far from ground zero.


How do you say 0000 hours in words?

Zero hundred hours if you want to sound military. Normal people would just say midnight.


What are decibels a measure of?

The intensity of sound is measured in a unit called the decibel (dB), which describes the relative intensity of a sound based on an algorithmic decibel scale containing values ranging from 0 to 194. A zero value on the decibel scale represents the weakest sound audible to humans and sound intensity increases in correspondence with numeric values, the relationship among the values on the decibel scale is not linear but algorithmic. Here is an example of the decibel scale http://www.explainthatstuff.com/soundlevelmeters.html


How many people live in Pompeii?

Zero people live in Pompeii today, or so I've heard. But just to be sure look on Google.


What is Taylor Buchholz salary?

never heard of him. probably zero


What is the least count of an audiometer?

The LEAST count would be Zero (0). This is not trivial. There is an established standard for what Zero actually is, as a reference point in Air.BS EN ISO 389 (1997) "Acoustics. Standard reference zero for the calibration of pure tone air conduction audiometers"