Welch Allyn/Hillrom Professional Adult Stethoscope – Lightweight and Professional Double-Head Models for Clinical AssessmentsWelch Allyn Hillrom Professional Adult Stethoscope Lightweight and Professional Double Head Models for Clinical Assessments The Professional stethoscope provides medical professionals with a broad range of auscultation capabilities, from the very low pitch (20 100 Hz) of certain heart murmurs to the higher frequencies (100 500 Hz) of aortic and pulmonic insufficiencies. It features lightweight and flexible tubing, which makes it perfect for slipping