you record it through your ears.
:)
Noise levels of sound in the air are tested by a sound pressure level meter (SPL meter).Noise levels in an electronic circuit are tested by a volt meter.
Comparison of Sound Pressure and Sound Intensity Levels. Scroll down to related links and look at "Comparison of Sound Pressure and Sound Intensity Levels".
Very simply, yes.
You can have it tested at the doctors.
Usually the ph is tested with a phenol red indicator but litmus paper can be used
Hydrogen.
Get your brakes tested. I do not know what a ticking sound means.
there is a significant or unexplained difference between the levels of sound heard between the two ears, or if the person being tested is unable to hear in the normal range of frequencies and volume.
The adding of this two sound will give you total sound level of 87 dBSPL. Scroll down to related links and look at "Adding acoustic levels of sound sources - Combining decibels, adding of levels, or combining levels".
Only the ear drums can convert the sound pressure. That is not the acoustic intensity.
The units used to measure sound pressure levels are decibels (dB).
Sound pressure levels are typically measured in decibels (dB).