Process of acoustic emission for sonar
AssigneeThomson-CSF
InventorGeorges Grall
Life of this patent
Estimating the term…
Abstract
A process of acoustic emission for sonar with a separate emission array from the receiving array. The emission array has the shape of a linear acoustic array and can either be towed simultaneously with linear acoustic receiving array or be suspended from a helicopter to form a "dipping" type sonar. Detection using this type of sonar is facilitated by increasing the sound level via the directivity index, while reducing the level of reverberation originating from the bed and from the surface of the sea.
Claims12
Process of acoustic emission for a sonar, comprising the steps of:
- towing in water with the aid of a hauling cable, a passive linear acoustic array;
- and
- towing a separate linear acoustic array with said hauling cable wherein said separate linear acoustic array is held substantially vertical and emits signals received by said passive linear acoustic array.
Device for implementing an acoustic emission for a sonar comprising:
- a passive linear acoustic array;
- a separate linear acoustic array for emitting acoustic signals whose echos are received by said passive linear acoustic array;
- a hauling cable for towing said passive linear acoustic array and said separate linear acoustic array wherein said separate linear acoustic array has a weight and shape enabling it to be towed at a small inclination relative to the vertical while the receiving array is towed substantially horizontally.
Device for implementing acoustic emission, comprising:
- a sonar with deployable receiving array suspended from a helicopter by a cable;
- and
- a linear acoustic emission array suspended above or beneath the receiving array wherein the cable forms an integral part of the linear emission array.
A process of acoustic emission, comprising the steps of:
- suspending a sonar with deployable receiving array from a helicopter by a cable;
- suspending from said helicopter, a linear acoustic emission array wherein said linear acoustic emission array is suspended above or beneath the receiving array wherein said linear acoustic emission array emits acoustic signals whose echos are received by said receiving array or in said linear acoustic array which is held substantially vertical.
Dependencies are inferred from the claim text.