{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9591406","patent":{"patent_number":"US-9591406","title":"Multi-track stereo sound earphone","assignee":null,"inventors":[],"filing_date":"2016-04-25T00:00:00.000Z","publication_date":"2017-03-07T00:00:00.000Z","cpc_codes":["H04R","H04R","H04R","H04R"],"num_claims":7,"abstract":"A multi-track stereo sound earphone includes an earphone main body, which includes a loudspeaker inside, a resonance cavity connected thereto, a sound hole plate, and a solid plate. The earphone main body further includes: at least a low sound hole, disposed in middle position of a lower encircling perimeter of the resonance cavity; at least a high sound hole, disposed in a middle position of an upper encircling perimeter of the resonance cavity; and a plurality of medium sound holes, disposed surrounding a sound hole plate in front of the loudspeaker. The solid plate is disposed in center of the sound hole plate, opposite to center of a vibration membrane of loudspeaker. The diameters of the plurality of medium sound holes decrease from bottom to top, and the plurality of medium sound holes are distributed around outer perimeter of the solid plate."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Multi-track stereo sound earphone","description":"A multi-track stereo sound earphone includes an earphone main body, which includes a loudspeaker inside, a resonance cavity connected thereto, a sound hole plate, and a solid plate. The earphone main ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9591406","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9591406","citation_suggestion":"Patentable. \"Multi-track stereo sound earphone\" (US-9591406). https://patentable.app/patents/US-9591406","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9591406","json":"https://patentable.app/api/llm-context/US-9591406","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:04:08.622Z"}