Decrease in signal or sound pressure in decibels as a speaker or speaker driver attempts to reproduce frequencies outside of its primary frequency range (a midrange driver may roll-off at 500 Hz and its output decreases from that point); attenuation of frequencies outside a range specified in a crossover network.

A fall in gain at the extremes of the frequency response. The rate at which a filter attenuates a signal once it has passed the filter cut-off point.

The attenuation of frequencies at the high or low end of the audio frequency spectrum.

trash receptacle for industrial customers, ranging in size from 10 cubic yards to 40 cubic yards, as well as specialized compactors. Roll-off bins can be utilized for trash or recycling services. Special roll-off trucks have a lifting mechanism that can hoist the bin onto the flatbed truck and secure it during transport, then lift it at a steep angle into the air in order to empty it.

(Ro/Ro)--A term applied to ships that are outfitted so that vehicles or heavy machinery can be driven on or off without the use of special cranes.

Abbreviation: RoRo. System of loading and discharging a vessel whereby the cargo is driven on and off by means of a ramp.