A photoacoustic sensor includes a sensor system for photoacoustic detection, at least one noise canceling pressure sensor and a control system in operative connection with the noise canceling pressure sensor to actively cancel the effects of noise in the environment on the sensor system. These delays may be introduced by transmission delays, which include the distance between the agent and the customer, and processing delays, such as those introduced by systems and processes within a contact center. The bolt includes a head and a spindle connecting to the head. A sensor embedded in the chamber. The compressed frames for the terminals are scheduled such that the compressed transmissions for the compressed frames do not overlap.