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Sound volume is often measured in decibels. The decibel scale works in mnany ways. LOL
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Many ways indeed! it's not a simple matter, and we have to distinguish between intensity and power, which are not the same things. Most sound volumes figures are of Sound Pressure Level (SPL) in deciBels, and this is a brief explanation. It helps if know basic logarithm principles!
The deciBel (dB) is not a measure of power or intensity of sound only, but can describe any acoustic, electrical or electromagnetic signal, so to use it properly you have to specify the right units and scale.
Further, it is not a linear unit like a metre or a litre, but a product of a constant with the logarithm of a ratio! And that ratio's denominator is the reference levelrelevant to what you are measuring, and to which you compare the measured level.
We use this logarithmic scale because the human ear is roughly logarithmic in response to sound pressure; and the maximum pressure it can bear for a short time painfully but without injury is 1 million times the faintest it could hear before too many of those maxima hit it for too long.
In measuring sound in air by deciBels, you use 20µPa (20 micro-Pascals), where the Pascal is the official SI unit of pressure. It's an extremely tiny pressure, but still too big for acoustics, where you need to work in millionths of Pascals - i.e. micro-Pascals. (The standard abbreviation for 'micro' is the Greek letter µ.)
Why 20µPa? It is the SPL of the faintest sound the fully-healthy human ear can detect - a staggeringly low 1/(5000 000 000) of Standard Atmospheric Pressure.
So deciBels avoid clumsy calculations with lots of big exponents, and turns many of the sums into just adding and subtracting modest numbers.
Therefore, measuring sound level in air, and without going into the derivation of the 20 constant, the SPL = [ 20 log-base-10 (measured pressure µPa / 20µPa) ] deciBels.
So to quote the sound pressure level fully, it is N dB re[ferred to] 20µPa.
Marine acoustics - dolphin calls, sonar etc. - uses a mere 1µPa as reference, so the two sound scales are not readily comparable.
A measured level equal to its reference is 0dB in whatever scale you use, because the ratio is then 1, and as log-base-10(1) = 0, so 20log(1) = 0.
Why can't you count from 0µPa? Because that makes the denominator 0, and you can't divide by 0.
What else can I help you with?
How is the sound of volume measured?
Answer is by sound waves
Is TV volume measured in dB?
All sound output can and is measured in dB (decibel's)
The unit which sound is measured?
The unit for measuring the volume of sound is the decibel.
How a solid be measured?
It can be measured by volume
How is sound volume measured?
Loudness is the quality of a sound that is the primary psychological correlate of physical strength or amplitude. Loudness is a subjective felt impression and is in some way related to the objective measure (volume) of the sound pressure. You use a sound pressure level meter. Neither our ear drums nor the microphone diaphragms can convert acoustic intensity. Therefore only use the sound pressure for measuring. To measure the loudness feeling is a difficult thing. The loudness of 1 sone equals the loudness level of 40 phons (at 1 kHz).
How is the sound of volume measured?
Answer is by sound waves
What is the unit for the for the volume of sound?
The volume of a sound is measured by the sound pressure in pascals or newtons per square meter. The sound pressure level is measured by a sound pressure level meter (SPL meter).
What is the volume of a sound and how is it measured?
The volume of a sound refers to how loud or soft it is. It is measured in decibels (dB), with higher decibel levels indicating louder sounds.
What is the gadget to measure sound volume?
The volume of a sound is measured by the sound pressure in pascals or newtons per square meter. The sound pressure level is measured by a sound pressure level meter (SPL meter).
Is TV volume measured in dB?
All sound output can and is measured in dB (decibel's)
Another word for loudness of sound?
Sound is normally measured is naturally measured in decibels (dB) which is a logarithmic scale.
What term describes how loud a sound is?
The term that describes how loud a sound is is "volume." Volume is the measure of the intensity or amplitude of a sound, typically measured in decibels.
Measure of sound?
Sound intensity is measured in a increment called a decibel, and its characteristics are decribed in terms of its frequency , wavelength, and amplitude.
What determines the volume of sound?
The volume of a sound is measured by the sound pressure in pascals or newtons per square meter. The sound pressure level is measured by a sound pressure level meter (SPL meter).
Unit used to measure volume of sound?
That is commonly measured in decibels.
What is the volume level measured in decibels of a sound that registers at 55 decibels?
The volume level of a sound that registers at 55 decibels is 55 decibels.
What does volume mean when we are describing a sound?
Volume refers to the loudness or intensity of a sound. It is measured in decibels (dB), with higher decibel levels indicating a louder sound. Volume is influenced by the amplitude of the sound wave, which determines how powerful the sound is perceived to be.
