SPL may be measured with a SOUND LEVEL METER weighted according to a specific ... Two SPL measurements in decibels may be combined with the aid of the following chart. The difference in decibels ...

An hourly average of the Noise Level (HNL) including number of flights per hour N is ... Correlation to community reaction is shown in the following chart for the CNEL scale (with approximate CNR and ...

Inside the Government Center stop at peak screech, the sound level ... testing, noise inside a train traveling between Porter and Harvard peaked at 110 dBA, which, according to a chart produced ...

Bengaluru: Bengaluru is experiencing a rise in noise pollution, with data from Karnataka State Pollution Control Board (KSPCB) showing a 30% increase in decibel levels during day at almost all ...