A unit of perceived noisiness, introduced by American acoustics engineer K. D. Kryter in 1959. One noy is defined to be the noisiness of a random noise signal ranging from 910 to 1090 hertz at a sound pressure level of 40 decibels. A jet takeoff is rated at about 110 noys.
A unit of perceived noisiness, introduced by American acoustics engineer K. D. Kryter in 1959. One noy is defined to be the noisiness of a random noise signal ranging from 910 to 1090 hertz at a sound pressure level of 40 decibels. A jet takeoff is rated at about 110 noys.