SAFETY DEVICE AND METHOD FOR EMITTING A DIRECTIONAL ACOUSTICALARM SIGNAL

摘要

The present invention relates to a safety device for emitting a substantiall y tonal acoustic alarm signal, the device comprising: - a sound source for generating an acoustic alarm signal, - directing means for directing the ala rm signal in substantially one or more preferred directions and attenuating the alarm signal in the other directions. The invention also relates to a method for emitting a substantially tonal acoustic alarm signal, comprising of: - generating an acoustic alarm signal, - directing the alarm signal in substantially one or more preferred directions and attenuating the alarm signal in the other directions.