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US 2016/0105745 A1Published application
Acoustic apparatus and operation
AssigneeCerberus Black Ltd
InventorsMatthew Henry, Edward Kinsella
Life of this patent
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AssigneeCerberus Black Ltd
InventorsMatthew Henry, Edward Kinsella
Estimating the term…
A portable acoustic warning device which projects a specific acoustic waveform towards a target, creating a narrow beam of sound that is highly selective, minimising exposure to users and bystanders, whilst enabling a controlled dosage of sound to be applied to the target. The design of the device is tailored to this waveform thus achieving a very high degree of directivity. It is not intended for communicating verbal messages. This waveform achieves maximum intensity at the target whilst using a relatively low sound pressure level; meaning that the exposure levels can be controlled to ensure they are within existing health and safety legislation. A laser range finder limits the sound level at the target to a pre-determined level. An integrated camera is used to aid aiming. Video footage is recorded with use; along with the sound level at the target, exposure duration, time, date and GPS coordinates.
A directional acoustic warning device, suitable for creating a greater sound pressure at a selected target than around the target, wherein the device has a sound pressure generating source coupled to a sound guiding structure, wherein the sound pressure generating source comprises an electronic signal generating system connected to a transducer, the transducer being capable of converting electronic signals from the signal generating system to sound pressure waves, and wherein
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A sound guiding structure for an acoustic device, including a straight-walled cone-shaped horn having a throat end for connecting to a sound pressure source and an open mouth end, wherein the throat end is narrower than the mouth end, and wherein a phase plug is mounted within the horn and spaced from the inner wall of the horn, wherein the phase plug is a bi-conic solid shape, formed from first and second straight-walled cones joined at their bases, and mounted within the horn such that the first cone of the phase plug has a tip end towards the throat of the horn cone, and wherein the second cone of the phase plug has a ring of acoustically absorbent material coaxially mounted on its surface.
A sound guiding structure for an acoustic device, including a cone-shaped horn having a throat end for connecting to a sound pressure source and an open mouth end, wherein the throat end is narrower than the mouth end, and wherein a horn ring of acoustically absorbent material is provided at the wide end of the horn, wherein the horn ring is mounted on the exterior of the horn and extends beyond the mouth of the horn to reduce acoustic emissions away from the central axis of the horn.
Dependencies are inferred from the claim text.