Abstract
A blood flow noise transducer for use on the eyes has been designed to take the place of an ordinary accelerometer-type setting on the head skin. The blood flow noise is generally considered to be generated by the turbulent flow in an artery due to deformation of the vascular wall, such as an aneurysm. The present transducer is intended to detect the turbulent flow noise from the intracranial aneurysms clearly by setting the transducer on the eyes. A novel transducer has been constructed using PVDF film, which has a sensitivity of − 63 Db (V/μbar) and a bandwidth of over 2.5 kHz. In clinical applications the transducer has shown fairly good results. Simulated experiments using the transducer with a cranial model suggest that the localization of the sound source can be predicted by data processing.
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