WHAT IS AMBIENT NOISE and HOW IS IT REDUCED?
Sources of ambient noise: • Human voices and movement • Medical equipment (respirators, heart/lung machines, heart monitors) Other environmental sounds Ambient noise isn’t just in the air; it also travels through the patient’s body. The key to reducing ambient noise is to address both pathways. Ambient Noise Reduction (ANR) does just that without filtering away important sounds. Noise from the room enters the stethoscope through a thin gap in the chestpiece and , once inside, meets noise that enters throug the body. The two cancel each other out, leaving the heart, lung and other body sounds you want to hear. Acoustic cancelling effect is different than electronic filtering, which may also filter out some portions of body sounds.
