Nowadays, multiple areas of engineering use ultrasonic sensors, mainly due to their high precision within short distances and their robustness to electromagnetic interference. The well-known HC SR04 ultrasonic sensor generates ultrasonic waves at 40kHz frequency. While there is no shortage of information about its working principle, applications, and limitations, little is known about the energy density (i.e., intensity) of t ultrasonic pulses it generates. Could anyone provide me with such information? I will very much appreciate it!
Unqualified comments: It ought to be a calibration exercise. For a ranging device, one has to understand the instrument function at different energy levels, ambience characteristics and natural constants involved. For any given energization setting you can develop sonic curves and isobar/s to understand flux magnitude within space-time of interest, using usual modles.
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