Patent ID: 8605548

Claim:
A bi-directional acoustic telemetry system for communicating data and/or control signals between a first modem and a second modem along tubing, the system comprising: a bi-directional communication channel comprising: the tubing, a transducer of the first modem, and a transducer of the second modem, wherein the transducer of each modem is configured to transmit and receive said data and/or control signals, and wherein the transducer of each modem is further configured to electrically communicate with a power amplifier characterized by an output impedance Zs and a signal conditioning amplifier characterized by an input impedance Zr; and wherein the power amplifier and the signal conditioning amplifier are configured so that the output impedance Zs matches the input impedance Zr to achieve a matched spectral response in communications in both directions of the communication channel along the tubing between the first modem and the second modem.