(1) we first วัด the output
แรงดันไฟฟ้า taken from thePVDF hydrophone at the ทดสอบตำแหน่ง
(2)using the output แรงดันไฟฟ้า,
we could then obtain the sound pressure of the ultrasonic source
(3) we then วัด the output แรงดันไฟฟ้า
of our sensor device when it was placed at the same ทดสอบตำแหน่ง
as the PVDF hydrophone and
(4) the sensitivity of our sensor
could be estimated by comparing the sound pressure obtained
from the PVDF hydrophone and the output voltage taken from
our sensor.