{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9838791","patent":{"patent_number":"US-9838791","title":"Portable sound generator apparatus","assignee":null,"inventors":[],"filing_date":"2017-02-27T00:00:00.000Z","publication_date":"2017-12-05T00:00:00.000Z","cpc_codes":["H04R","H04M","H04R","H04R"],"num_claims":20,"abstract":"An apparatus and method for generating alerting sounds and broadcasting the same into the interior of a building so that an occupant can be made aware of an emergency, warning, etc. or of the building for various other purposes such as to greet a visitor or accept a package or sign documents from a transporter drone or robot. The sounds are generated by an exciter feature of a transducer held in a case, the exciter feature being able to be pressed against an exterior surface. The transducer vibrates its exciter feature in correspondence with audio signals transmitted to the transducer to broadcast corresponding sounds into the interior of the building by resonance induced in the door or other building member by the vibrating exciter feature. The sounds may resemble conventional alerting sounds such as a knocking or ringing sounds, and/or can be a spoken message either prerecorded in an audio source or created contemporaneously by being spoken by a user into a microphone. The device may be hand carried door to door as by delivery personnel and emergency workers and used to effectively alert occupants and eliminate the need for hand knocking or yelling a message through the door, or is mounted to a drone, robot, or other transporter device, or to some other portable device. The device may also be used to broadcast sounds in an open area by holding the exciter feature against a sign board or other structure in an open area."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Portable sound generator apparatus","description":"An apparatus and method for generating alerting sounds and broadcasting the same into the interior of a building so that an occupant can be made aware of an emergency, warning, etc. or of the building","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9838791","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-9838791","citation_suggestion":"Patentable. \"Portable sound generator apparatus\" (US-9838791). https://patentable.app/patents/US-9838791","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9838791","json":"https://patentable.app/api/llm-context/US-9838791","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T04:32:20.997Z"}