| 摘要 |
Acoustic pick-up assemblies are described, particularly for use in monitoring heart or lung sounds within a patient's body. The assemblies comprise a housing with an electret transducer 6 located therein. In a typical construction, the housing consists of a round disc-like base 4 and a lid 3, the base 4 including annular air pockets 16 for acoustic insulation and having formed in it a chamber on one side of which is the electret transducer 6 and the other side of which is formed by an elastic membrane or diaphragm 2 which may be held against, or adhered with a hydrocolloid adhesive to, the skin of a patient. |
