Bang & Olufsen patented a loudspeaker device with a diaphragm and enclosure allowing sound emission or prevention based on sound pressure levels. The device aims to prevent non-linear distortion of acoustic output by controlling acoustic communication between the internal cavity and surroundings. GlobalData’s report on Bang & Olufsen 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 Bang & Olufsen, AR audio was a key innovation area identified from patents. Bang & Olufsen's grant share as of April 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
Variable acoustic element for loudspeaker device to prevent distortion
A recently granted patent (Publication Number: US11943578B2) discloses a loudspeaker device designed to improve sound quality, especially at low frequencies. The device includes a loudspeaker unit with a diaphragm mounted in an enclosure, where the diaphragm has two surfaces - one in acoustic communication with the surroundings and the other with an internal cavity. An acoustic element controls the emission of sound energy from the internal cavity to the surroundings, based on a threshold value of sound pressure level to prevent non-linear distortion of the acoustic output. The device also features amplifier means with a volume control that adjusts the acoustic element's state between open and closed, allowing users to control sound emission.
Furthermore, the patent describes methods for optimizing sound quality by setting a threshold value based on the loudspeaker unit's diaphragm excursion limit, determining if the threshold value is exceeded, and adjusting the acoustic connection between the internal cavity and surroundings accordingly. The threshold value is linked to the volume control setting, enabling the enclosure to function as either a closed box or an open box based on the sound pressure level produced. The volume control can activate or deactivate sound emission with or without hysteresis, providing users with flexibility in controlling the acoustic element's state. Overall, the patented loudspeaker device offers innovative features such as user-controlled acoustic element adjustments, Helmholtz resonator functionality, and digital signal processing filter interactions to enhance sound quality and user experience.
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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.
