title: New Stethoscope With Extensible Diaphragm.
abstract: BACKGROUND
  This study compared the diagnostic efficacy of the common suspended diaphragm stethoscope (SDS) with a new extensible diaphragm stethoscope (EDS) for low-frequency heart sounds.
  
  
  RESULTS
  The EDS was developed by using an ethylene propylene diene monomer diaphragm. The results showed that the EDS enhanced both the volume and quality of low-frequency heart sounds, and improved the ability of examiners to auscultate such heart sounds.
  
  
  CONCLUSIONS
  Based on the results of the sound analysis, the EDS is more efficient than the SDS. (Circ J 2016; 80: 2047-2049).
authors.affiliation: Takashina Clinic.
authors.forename: Tsunekazu
authors.initials: T
authors.lastname: Takashina
authors.forename: Masashi
authors.initials: M
authors.lastname: Shimizu
authors.forename: Torakazu
authors.initials: T
authors.lastname: Muratake
authors.forename: Syuichi
authors.initials: S
authors.lastname: Mayuzumi
mesh_terms: D006347:Heart Sounds; D006801:Humans; D019023:Stethoscopes