The Most Respected Name In Auscultation. Stainless steel chest piece and binaurals designed for optimal weight and durability. Dual channel PVC tubing provides separate sound pathways to each ear. Triple-leaf binaural spring encased in polyurethane permits size adjustment while preventing breakage. Come with a 10-year warranty from Welch Allyn. Also includes three additional sets of eartips. Most significant heart sounds occur in a frequency range (200 Hz to 500 Hz) well under the optimal human auditory threshold of 1000 Hz. The diaphragm of the Elite has been quantitatively verified to effectively transmit and amplify this most important range of heart sounds. The bell chest piece of the Elite is used for detection of lower frequencey sounds from 20 Hz to 100 Hz. |