{"data":{"id":"us/21-cfr-870.2390","jurisdiction":"us","citation":"21 CFR 870.2390","heading":"Phonocardiograph.","body":"(a) Identification. A phonocardiograph is a device used to amplify or condition the signal from a heart sound transducer. This device furnishes the excitation energy for the transducer and provides a visual or audible display of the heart sounds.\n(b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 870—CARDIOVASCULAR DEVICES","Subpart C—Cardiovascular Monitoring Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"999d947929a30dcf263759103fd9c68ae8cae61ce2a0f9e8fe7dda95118421db","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-870.2370","next":"us/21-cfr-870.2400"},"notice":"GroundRules: Original legal text. Not legal advice."}