Description

• The bell and diaphragm are heavy enough to rest firmly on the body surface.
• The cover of the diaphragm is stiff.
• The bell has a big enough diameter to span an adult’s intercostal gap and is deep enough not to fill with tissue.
• The bell and diaphragm are designed for children’s use.
• To ensure secure contact with the body surface, a rubber or plastic ring is wrapped around the bell edges.
• Thick, stiff, and heavy tubing transmit better than thin, elastic, or extremely flexible tubing.
• To avoid distortion, the tube is between 30.5 and 40 cm (12 and 18 inches) long.
• The earpieces were snug and comfortable to wear. Some instruments offer a variety of earpiece sizes, while others have rigid earpieces.