He is transported to that curious world of decibels and negative frequencies where filter experts live. Arnold Tustin
At an elementary school in Minato Ward and an office of the Tokyo’s waterworks bureau in Shinagawa Ward, over which aircraft will fly low during their landing approach, the reading hit as high as 78 to 81 decibels. Source: Internet
Byers said equipment at the site will generate about 63 decibels measured about 30 feet away, noise he said butting landowners would not be able to hear, and which would not be as loud as traffic going by on the road. Source: Internet
Every minibus is equipped with players and the music they play is often extremely loud and could impair one’s hearing since it is far above 80 decibels. Source: Internet
Environmental noise measurement A-weighted decibels are abbreviated dB(A) or dBA. Source: Internet
Examples All of these examples yield dimensionless answers in dB because they are relative ratios expressed in decibels. Source: Internet