TechSpot7y
Here's the story behind it
The decibel (dB) scale is logarithmic ... Consequently, 30dB is about twice as loud as 20dB, and a computer producing 40dB of noise would be approximately four times louder than one generating ...
The Boston Globe5d
Here’s where we found perhaps the screechiest MBTA train. It was ear-splitting.
That’s what the Globe discovered at several of the T’s most infamously noisy sections, with help from a sound level meter that measured the decibel output of all the rumbling and squealing ...
What parents can do to protect their children’s hearing — including the risks that should be avoided
Beyond exposure to loud sounds, causes of hearing problems in children include otitis media (infection of the middle ear), ...
Simon Fraser University6y
EQUAL LOUDNESS CONTOURS
The PHON scale was devised to express this subjective impression of loudness, since the DECIBEL scale alone refers to actual sound pressure or sound intensity levels. Historically, the A, B, and C ...