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10:49
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Originally posted by BobF:
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This idea seems to be completely at odds with the design of the AP micro-pixel array DSR MEMS. front of the MEMS plane and propagates as a planar wave moving out perpendicular to it. i.e. the sound is directional and is the composite of all the individual pulses that are themselves carefully distributed in space across the MEMS, and actuated in particular sequence order to enhance and preserve the coherence of that front. I think this is right at the heart of the DSR technique. I think that it was one of the big concerns with the development of the waterproofing cover (below) which was developed to accommodate the MEMS surface being able to be unimpeded by obstacles while protecting the MEMS from dust and vapour."... Audio Pixels Granted Several Patents 15 August 2013 ] – Audio Pixels Holdings Limited (AKP:ASX; OTCQX:ADPXY), a fabless semiconductor company focused on the development and production of MEMS based digital speaker chips revealed today that since the beginning of the new year its intellectual property portfolio has expanded to include 5 new patent families. The patents granted in various patent jurisdictions around the world include 2 patent grants for the Basic architecture and functional principles of its MEMS based digital speaker; control of volume and tone in digital speakers; Directivity patterns in direct digital speakers; and in the field of Packaging of MEMS based digital speakers “For example, the recent patent granted to us for Dust Protection covers a very unique innovation in MEMS packaging that provides the highest levels of protection for the chip from the environment while still permitting the sound waves generated inside the chip, to radiate to the environment with near negligible attenuation” . MEMS packaging is considered by the industry at large to be far more challenging than the packaging of traditional IC’s due to the diversity of requirements associated with providing the ability for the transducer (or sensor) to be in touch with the environment, yet protected from it. ..."
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Having looked at the patent in more detail, it is 100% related to AKP's product given the reference to digital sound chips. They also mention the permeable membrane. There's a number of configurations covered by the patent... https://www.patentguru.com/CN115709969A
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