42results about How to "Echo Cancellation" patented technology

The application relates to a ceiling assembly structure comprehensive system and relates to the technical field of building decoration, which comprises a plurality of connecting rod units and a conversion layer; one end of the plurality of connecting rod units is used for being connected with a roof beam of a wall top surface; the conversion layer is connected with the other end of the plurality of connecting rod units; the conversion layer has a cavity; the bottom surface of the conversion layer is provided with a plurality of ceiling surface layers; a first opening is formed between two ceiling surface layers; the top of the conversion layer is provided with a plurality of second openings; and the second openings are used for being communicated with smoke exhaust ports of the wall top surface. The conversion layer can be used for maintenance personnel to maintain the ceiling surface layer; secondly, when a fire occurs, smoke can pass through the plurality of first openings, the cavity and the plurality of second openings in sequence and be exhausted from the smoke exhaust ports of the wall top surface, so that fire safety is ensured; in addition, sound-absorbing panels absorb indoor noise, and when a high hall or the like is designed, the sound-absorbing panels can eliminate echo in a closed space and achieve ideal acoustic effects.