Question

What is the frequency range of sound generated from the closure of the mitral and tricuspid valve?

(a) 0 to 30 Hz

(b) 30 to 100 Hz

(c) 100 to 1000 Hz

(d) above 1000 Hz

I had been asked this question in exam.

I want to ask this question from Measurement of Temperature topic in portion Patient Monitoring System of Biomedical Instrumentation

Answer 1

Right answer is (b) 30 to 100 Hz

To elaborate: The closure of the mitral and tricuspid valve contributes largely to the first sound. The frequencies of these sounds are generally in the range of 30 to 100 Hz and the duration is between 50 to 100 ms.