{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9667803","patent":{"patent_number":"US-9667803","title":"Nonlinear acoustic echo cancellation based on transducer impedance","assignee":null,"inventors":[],"filing_date":"2015-09-11T00:00:00.000Z","publication_date":"2017-05-30T00:00:00.000Z","cpc_codes":["H04M","G10L","H04M","H04R","H04R","G10L","H04R","H04R"],"num_claims":25,"abstract":"An acoustic echo cancellation (AEC) system within an audio playback system of an electronic device, such as a mobile phone, may calculate an estimation of an acoustic echo based on parameters describing the transducer reproducing the audio playback signals. Those parameters may include, for example, a resistance and/or inductance of the transducer and a current through and/or a voltage across the transducer. The acoustic echo cancellation system may predict, for example, a coil velocity of the transducer based on the transducer impedance. Then, an echo may be estimated using the predicted coil velocity. That estimated echo may be output to the transducer to cancel echo in the playback signal. Additionally, that estimated echo may be used to predict nonlinearities in the transducer output and an appropriate signal generated to cancel nonlinear behavior."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Nonlinear acoustic echo cancellation based on transducer impedance","description":"An acoustic echo cancellation (AEC) system within an audio playback system of an electronic device, such as a mobile phone, may calculate an estimation of an acoustic echo based on parameters describi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9667803","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-9667803","citation_suggestion":"Patentable. \"Nonlinear acoustic echo cancellation based on transducer impedance\" (US-9667803). https://patentable.app/patents/US-9667803","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9667803","json":"https://patentable.app/api/llm-context/US-9667803","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T03:56:16.328Z"}