The usual answer to such question is "it depends". That being said, heart relate...

		mr__y on Jan 15, 2020 \| parent \| context \| favorite \| on: Glia – High-quality low-cost open source medical h... The usual answer to such question is "it depends". That being said, heart related sounds are generally low-frequency while breathing/lung related sounds are broadband so they do contain a significant higher frequency part.