Cohu. has filed a patent for a sound test device designed to test MEMS microphones. The device includes a sound chamber, socket unit, and sound generator unit with a speaker and reference microphone. The setup allows for accurate testing of DUTs by creating a controlled sound environment. GlobalData’s report on Cohu gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Cohu, was a key innovation area identified from patents. Cohu's grant share as of January 2024 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Sound test device for mems microphone testing
A newly filed patent (Publication Number: US20230416077A1) describes a sound test device designed for testing a Device Under Test (DUT). The device includes a sound chamber, a socket unit, and a sound generator unit. The sound generator unit features a speaker with a speaker membrane, an opening, and a reference microphone with a microphone membrane. The opening is positioned to receive the DUT opening, with the microphone membrane and opening arranged to oppose each other. The socket unit includes at least one contact element to connect to a contact terminal of the DUT, while the sound chamber is defined by the speaker membrane, microphone membrane, and opening. Additionally, an insert with a hollow conical shape tapering towards the opening can further limit the sound chamber.
Furthermore, the patent details various configurations and components of the sound test device, such as the material of the insert being an electrically non-conductive ceramic material, the maximal free length of the sound chamber being 16 mm, and the presence of speaker caves to further limit the sound chamber. The device also includes features like insulation on the speaker membrane for sound transmission, a ground ring contact for electrical connection and airtight sealing, and a contact socket with contact pins for connecting to opposite contact terminals of the DUT. The method for testing a DUT involves placing the DUT opening on the device's opening, contacting the contact elements to the DUT's terminals, and utilizing the sound chamber, socket unit, and sound generator unit for testing purposes.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
