Zero decibels (0 dB) is the quietest sound audible to a healthy human ear. From there, every increase of 3 dB represents a doubling of sound intensity, or acoustic power. Loudness and Sound Intensity (Power) The relative loudness that we perceive is a subjective psychological phenomenon, not something that can be objectively measured.
For instance, a 100 Hz sound at 60 dB will not sound as loud as a 1000 Hz sound at 60 deciBel. Fletcher–Munson curves or equal loudness curves are often used to demonstrate the perceived loudness of a sound for a given frequency.
Perceived loudness is a psycho-acoustic quantity that depends on sound pressure level, the frequency spectrum, and the time behavior of the sound in question. Level, Volume, and Loudness: The sone is a unit of perceived loudness proposed by Stanley Smith Stevens in 1936. That is: 40 phon or 40 dB at 1 kHz; see: Sone and phon. Perceived volume or loudness of sound, is a complex phenomenon, not
the relationship of voltage, loudness, power and decibels What a boring title! On the contrary, I think you will find the information contained herein to be both enlightening (maybe …
decibel (loudness) comparison chart Here are some interesting numbers, collected from a variety of sources, that help one to understand the volume levels of …
Loudness, a subjective measure, often confused with physical measures of sound strength such as sound pressure, sound pressure level (in decibels), sound intensity or sound power. Filters such as A-weighting and LKFS attempt to compensate measurements to correspond to loudness as perceived by the typical human.
Decibels (a measure of loudness) and watts (a measure of amplifier power) are common terms used when describing audio equipment.They may be confusing, so here is a simple explanation of what they mean and how they relate.