Dependence of Blood Pulse Shapes on Attachment Diameters of a Condenser Microphone


Author: Aoki Y 1// Adachi Y 1//Suzuki S 2//Horiuchi M 1//// 

Affiliation: Chubu University [1]// Kumamoto National College Of Technology [2]////
Conference/Journal: J Mind-Body Science
Date published: 1999
Other:
 Volume ID: 8   ,  Issue ID: 1   ,  Pages: 51-58   ,  Special Notes: Text in Japanese; abstract in English   ,  Word Count: 113  
    Blood pulse shapes were determined as a function of diameter d of attachments for a condenser microphone. Our findings are summarized as follows: (1) Sensitivity for measuring the pulse was best for d ~9.3- 16mm within the experiment conditions adopted. (2) The pulse shapes were different for different d. (3) Times for appearances of the second and the third peaks in a pulse wave gradually increased for increasing d, reached their maximum at d =16mm, then decreased. (4) Height of the second peak in a pulse wave gradually decreased for increasing d, reached its minimum at d = 14-16mm, then increased. The dependence of the pulse height of the third peak on d showed a complicated characteristic.