114 Lecture 6 
n 
5 6 700 
1000 
f en kHz 
Fig. 6.11. Pulse length vs Q for given amplitudes of the signal value on continuous waves. 
6.2.3. Application of the Pulse Method for Reciprocity Calibration 
We will call 7, and 7, the two transducers to be calibrated, 7; being a third 
auxiliary transducer. Their receiving sensitivities are M,,M,,and ™,; their trans- 
mitting responses,S,, S$, and S;. To summarize the results: 
—5 
Reciprocity factor, J = ay = Me = 2:10"" 
Se Sa f 
Transfer impedance, Z = MS; = MS, = 2 
1 
where e, is the voltage on T,, e, is the voltage on 7,, and |; is the intensity 
through 7,. The ratio of sensitivity between T, and T, is 
