{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9747906","patent":{"patent_number":"US-9747906","title":"Determining media device activation based on frequency response analysis","assignee":null,"inventors":[],"filing_date":"2014-11-14T00:00:00.000Z","publication_date":"2017-08-29T00:00:00.000Z","cpc_codes":["G10L","G10L","H04N","H04N","H04N","G10L","G10L"],"num_claims":20,"abstract":"Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to determine media device activation based on frequency response analysis are disclosed. Example methods disclosed herein include determining a reference frequency response based on first frequency values of an audio signal used to perform watermark detection for a first time interval during which a media device has been determined to be active. Such example methods also include determining a second frequency response based on second frequency values of the audio signal used to perform watermark detection for a second time interval different from the first time interval. Such example methods further include comparing the second frequency response with the reference frequency response to determine whether the media device was active during the second time interval."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Determining media device activation based on frequency response analysis","description":"Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to determine media device activation based on frequency response analysis are disclosed. Example methods disclose","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9747906","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-9747906","citation_suggestion":"Patentable. \"Determining media device activation based on frequency response analysis\" (US-9747906). https://patentable.app/patents/US-9747906","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9747906","json":"https://patentable.app/api/llm-context/US-9747906","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T19:50:53.117Z"}