30 results about "Architectural acoustics" patented technology

The invention discloses a carbide slurry fly ash fiber-reinforced architectural flat plate and a manufacturing method thereof. The carbide slurry fly ash fiber-reinforced architectural flat plate comprises the components in percentage by weight as follows: 36 to 45 percent of carbide slurry, 42 to 48 percent of fly ash, 6 to 8 percent of cement, 5 to 8 percent of quartz sand, 6.5 to 9 percent of cellulose fiber and 1 percent of poly-acetamide. The manufacturing method of the carbide slurry fly ash fiber-reinforced architectural flat plate comprises the following steps: step I, fiber refinement; step II, material feeding and pulping according to a formula; III, pulp storage, pulp discharge, pick-up and forming; step IV, processing forming; and step V, coating and packaging. The invention has the advantages that by utilizing local industrial waste namely the carbide slurry and the fly ash as main raw materials and utilizing the cellulose fiber as a reinforcing material, the architectural flat plate which has a shrinkage deformation coefficient larger than that of an ordinary calcium silicate plate, and better fireproof performance is produced; the radioactivity measured value of the architectural flat plate is 10 to 20 percent of the minimum value allowed by a national regulation, so that the architectural flat plate belongs to green environmentally-friendly products; and not only the production process satisfies the requirement of circular economy, but products are plates for the fields of wall bodies, ceilings and architectural acoustics, which satisfy the requirements of componentization, assembly and dry work for architectural products, so that the architectural flat plate belongs to high-level architectural material products in the architectural products.

The invention relates to the field of architectural acoustics, in particular to a light sound-absorbing jacketed wall structure. The light sound-absorbing jacketed wall structure comprises a sound isolating layer keel fixed to a wallspace, double-layered gypsum boards are fixed to the outer side of the sound isolating layer keel, a sound absorbing layer keel is arranged on the outer side of the sound isolating layer keel, a gap is reserved between the double-layered gypsum boards and the sound absorbing layer keel, two telescopic gratings are arranged in the gap, one side end of each telescopic grating in horizontal direction is fixedly connected to a wall while the other side end is movable, the two telescopic gratings are fixedly connected to opposite two ends of the wall, separately, the two telescopic gratings can cover the whole straight wall space, a plurality of corrugated boards are vertically fixed in an equally spaced manner on each telescopic grating, and the corrugated boards are vertical to the wall space. The sound absorbing effect is improved by increasing density of the corrugated boards on the telescopic gratings, so that the reverberation time is shortened.

The invention discloses an active non-directional loudspeaker system with equalization, which includes an audio signal interface connected with a digital filter, the digital filter includes an inverse equalizer and a band-pass filter, and the digital filter is connected to There is a power amplifier, which is connected to the speakers, which include a counterhorn and a subwoofer. The invention is small in size and only works within the test frequency range required by relevant standards; by testing the spatial multi-point transfer function of the loudspeaker, and designing a digital signal filter system according to the multi-point transfer function, the amplitude frequency of the digital signal filter system The response is reciprocal to the amplitude frequency response of the omnidirectional speaker system on the peak and valley, so that the amplitude frequency response of the speaker system is relatively flat and the amplitude change of adjacent frequency bands is small; it can be used in architectural acoustics and electrical sound test.