Profile: Digital Audio Corp. produces noise-reduction filters. Our product line includes collection tools, clarification tools and countermeasures. We offer noise-cancellation filters, simplified tape-enhancement filters, multichannel adaptive filters, digital filters, multi-mode enhancement filters, and T-series filter modules. We design devices to aid detection and for the identification of covert audio communications. Our products range from hand-held signal detectors to integrated portable laboratories. We offer surface mount design and assembly, custom enclosures & silkscreening.