The nurse is teaching a group of unlicensed assistive personnel about the stethoscope. Which statements about the stethoscope are appropriate for the nurse to include in the teaching session? (Select all that apply.)

A. The diaphragm of the stethoscope is used for high-pitched sounds, such as lung and normal heart sounds, not low-pitched sounds. B. The binaural (earpieces) should fit snugly in the ears to ensure proper sound transmission and clarity. C. Short tubing provides more accurate sounds by minimizing sound distortion, making it ideal for clinical use. D. The bell of the stethoscope is used for low-pitched sounds, such as heart murmurs, not high-pitched sounds. E. The stethoscope works by blocking out environmental sounds to help the user focus on internal body sounds.