Audible explosive device simulator system for miles

Abstract

An acoustic training device for simulating the effects of a weapon posing omnidirectional threat in a tactical engagement simulation system generates an audible signal of a predetermined frequency and duration once activated. The amplitude of the signal generated corresponds to the kill-zone of the weapon being simulated. The signal may be modulated so as to produce a predetermined number of pulses which are easily distinguished from other noises associated with the tactical exercise.

What is claimed is: 
     
       1. An acoustic training device for simulating the effects of an omnidirectional weapon in a tactical engagement simulation system employing acoustic receivers, said training device comprising: a housing which resembles in size and shape the weapon to be simulated;   means disposed within said housing for generating an audible carrier signal of a particular frequency and duration;   means to modulate said audible carrier signal at a predetermined frequency, wherein said modulated signal is of sufficient amplitude to be detected by an acoustic receiver only within a range corresponding substantially to the kill-zone of the weapon to be simulated, and the duration of said signal is such that it can be distinguished from transient signals and noise;   means responsive to some external stimulus for activating said signal generating and modulating means.   
     
     
       2. An acoustic training device for simulating the effects of an omnidirectional weapon in a tactical engagement simulation system employing acoustic receivers, said training device comprising: a housing which resembles in size and shape the weapon to be simulated;   means disposed within said housing for generating an audible carrier signal of a particular frequency and duration;   means to modulate said audible carrier signal at a predetermined frequency, wherein said modulated signal is of sufficient amplitude to be detected by an acoustic receiver only within a range corresponding substantially to the kill-zone of the weapon to be simulated, and the duration of said signal is such that at least three modulations of said carrier signal are emitted so that the pulse-modulated signal can be distinguished from transient acoustic signals and noise;   means responsive to some external stimulus for activating said signal generating and modulating means.   
     
     
       3. An acoustic training device for simulating the effects of an omnidirectional weapon in a tactical engagement simulation system employing acoustic receivers, said training device comprising: a housing which resembles in size and shape the weapon to be simulated;   means disposed within said housing for generating an audible carrier signal of a particular frequency and duration;   means to modulate said audible carrier signal at a predetermined frequency, wherein the peak amplitude of said modulated signal is approximately 80 dB at one meter, and the duration of said signal is such that at least three modulations of said carrier signal are emitted so that said modulated audible carrier signal can be easily distinguished from transient signals and noise;   means responsive to some external stimulus for activating said signal generating and modulating means.   
     
     
       4. An acoustic training device for simulating the effects of an omnidirectional weapon in a tactical engagement simulation system employing acoustic receivers, said training device comprising: a housing which resembles in size and shape the weapon to be simulated;   means disposed within said housing for generating an audible carrier signal of a particular frequency and duration;   means to modulate said audible carrier signal so as to produce a pulse-modulated signal having a period of between 50 and 100 milliseconds, wherein the peak amplitude of said modulated signal is approximately 80 dB at one meter, and the duration of said signal is 1-5 seconds so that at least three modulations of said carrier signal are emitted allowing the pulse-modulated signal to be easily distinguished from transient signals and noise;   means responsive to some external stimulus for activating said signal generating and modulating means.   
     
     
       5. The invention of any one of claims 1-4 wherein said audible signal generating and modulating means comprises a power source, timing means, and an acoustic transducer responsive to the output of said timing means, said timing means comprising two binary counters, the first of which provides a single-frequency fundamental carrier signal to said transducer, and the second of which provides a tone modulation signal of a different frequency and on/off control signals to said transducer. 
     
     
       6. The invention of claim 5 further comprising a plurality of NAND gates to logically combine said carrier frequency signal, tone modulation frequency signal, and on/off control signals into a single pulse-modulated signal of a particular duration.