A
feedback control system (100) for data transmissions over a
computer network, comprising: a
natural language processor component (112) executed by a
data processing system (102) for receiving, via an interface (110) of the
data processing system (102), data packets comprising an input
audio signal detected by a sensor (134) of a
client device (104); the
natural language processor component (112) for
parsing the input
audio signal to identify a request, a content provider, and a trigger keyword corresponding to the request; a content selection component (118) executed by the
data processing system (102) for receiving the trigger keyword identified by the
natural language processor component (112) and, based on the trigger keyword, selecting a content item via a real-time content selection process;A feedback monitor component (120) for:receiving data packets carrying acoustic signals between the
client device (104) and a conversational
application programming interface (116) that has established a communication session (206) with the
client device (104) in response to interaction with the content item;measuring a characteristic of the communication session (206) based on the acoustic signals; andgenerating a quality
signal based on the measured characteristic; andadjusting the real-time content selection process, by the content selection component (118), based on the quality
signal.