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US 2004/0174771 A1Published application
Panoramic audio device for passive sonar
AssigneeThales
InventorPierre Alinat
Life of this patent
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Abstract
The invention concerns panoramic audio devices to process the impulsive signals received by passive sonars. It consists in isolating (120-122), in each beam, impulsive signals in the frequency and time domains and then filtering them (130-132) according to the characteristics of the human ear. All left and right signals are then summed in order to be listened to in a headset (150). It allows rapid processing of impulsive signals.
Claims7
Panoramic audio device for passive sonar used to study impulsive noise, of the type comprising an audio processing chain for “contacts”, characterized in that this chain comprises:
- A device for forming beams in the direction of each “contact” (111-11n).
- At least one module (120-122) for isolating, in the frequency and in time domains, each “contact” signal in each beam.
- At least two right-left processing modules (130-132) of each signal thus isolated to provide, from filtering according to the characteristics of the human ear, two left and right signals corresponding to each isolated “contact” signal.
- A summation device (141) for all left signals.
- A summation device (142) for all right signals. and
- A binaural listening device (150) receiving the summed signals on a left transducer and on a right transducer.
3 more elements
Dependencies are inferred from the claim text.