Generating Acoustic Quiet Zone by Noise Injection Techniques

Architectures and methods of an acoustic injection-for-cancellation system dynamically generating quiet zones for mitigating select acoustic signals from nearby acoustic noise sources, comprising

• an auxiliary transmit acoustic array comprising
• a plurality of input elements,
• a plurality of output elements, and
• a plurality of beam forming networks with element weighting functions,
• a diagnostic network consisting of
• a plurality of microphones distributed at various locations in the quiet zones for measurement of the combined acoustic noise field strength from selected noises and injected noise interference from the auxiliary transmit acoustic arrays, and conversion of said measurement to performance indexes, and
• an optimization process for the purpose of performing weight updating for elements of the auxiliary transmit acoustic arrays based on said performance indexes.

Architectures and methods of an injection-for-cancellation acoustic system dynamically generating quiet zones for mitigating undesired noises from nearby noise sources, comprising

• auxiliary transmit acoustic arrays comprising
• a plurality of input elements,
• a plurality of output elements, and
• beam forming networks with element weighting functions,
• diagnostic network consisting of microphones distributed at various locations in quiet zones, wherein said microphones measure the combined acoustic noise field strength from selected noises and injected noise interferences from the auxiliary transmit acoustic arrays, and conversion of said measurements to performance indexes, and
• an optimization process performing weight updating for elements of the auxiliary transmit acoustic arrays based on performance indexes.

Architectures and methods of injection-for-cancellation of an audio quiet zone generation system for mitigation of feedback from speakers to microphones, dynamically generating quiet zones around microphones, comprising

• auxiliary transmit arrays comprising
• a plurality of remote input elements,
• a plurality of output elements, and
• an audio beam forming network with element weighting functions, wherein said network dynamically causes destructive interference between the feedback audio signals from main speakers and those injected by the auxiliary transmit arrays over the quiet zone,
• diagnostic probes distributed in the quiet zones measuring the combined field strength of audio signals from main speakers and those injected from the auxiliary transmit arrays, and converting the measurement to performance indexes, and
• An optimization loop performing weight updating for elements of the auxiliary transmit arrays based on performance indexes.