Abstract: A loudspeaker has a horn adapted to both cause air drag and to direct acoustic waves. A speaker and signal generator are electrically coupled to the speaker and secure to the horn. The loudspeaker is transported over a target and dropped from a high elevation. Upon landing the loudspeaker commences broadcasting a message. A shock absorber may secure to the horn and absorbs some of the shock of impact. Contact sensors or motions sensors may trigger broadcasting a message from the speaker. A portion of the horn may be expandable to increase the size of the horn upon deployment or upon impact with the ground.

Abstract: Systems and methods for altering audio for more effective delivery to long range targets. An example of the present invention includes a speaker coupled to a processor and one or more sensors suitable for sensing environmental conditions such as temperature and humidity. The processor reads the output of the sensors and compensates for frequency dependent attenuation likely to occur at the sensed environmental condition. In one embodiment, the user specifies a range that the sound is to travel and an equalization table compensating for attenuation at the desired range is selected according to the user input.