I'm currently working on a project making use of ultrasonic proximity sensors. Unfortunately it seems as though well-documented ones are very few and far between (when compared to PIC or MOSFET datasheets).
As such I'm struggling to determine the bandwidth of these sensors. My understanding of bandwidth is that it is the frequency corresponding to the -3db attentuation point of a signal. How does this relate to a sensor?
(On a side note, can anyone explain the lack of quality in these datasheets? Am I looking in the wrong place? Vishay and Texas Instruments are really comprehensive, and then these datasheets barely have more than the sensor dimensions.)