15. A communication system for a speech-based environment, the communication system comprising: a text-to-speech engine configured to provide an audible output to a user, the text-to-speech engine including an adjustable operational parameter; and processing circuitry configured to monitor environmental conditions related to intelligibility of the audible output of the text-to-speech engine and, in response to the monitored environmental conditions, modify the adjustable operational parameter; wherein the monitored environmental conditions comprise a type of command received from the user, an experience level of the user with the text-to-speech engine, an experience level of the user with an area of a task application, an amount of time logged by the user with a task application, a language of a message being converted by the text-to-speech engine, a length of a message being converted by the text-to-speech engine, a frequency that a message being converted by the text-to-speech engine is used by a task application, or any combination thereof; wherein the adjustable operational parameter is a speed of the text-to-speech engine, which is temporarily reduced in response to the monitored environmental conditions to increase the intelligibility of the audible output to the user.
15. A communication system for a speech-based environment, the communication system comprising: a text-to-speech engine configured to provide an audible output to a user, the text-to-speech engine including an adjustable operational parameter; and processing circuitry configured to monitor environmental conditions related to intelligibility of the audible output of the text-to-speech engine and, in response to the monitored environmental conditions, modify the adjustable operational parameter; wherein the monitored environmental conditions comprise a type of command received from the user, an experience level of the user with the text-to-speech engine, an experience level of the user with an area of a task application, an amount of time logged by the user with a task application, a language of a message being converted by the text-to-speech engine, a length of a message being converted by the text-to-speech engine, a frequency that a message being converted by the text-to-speech engine is used by a task application, or any combination thereof; wherein the adjustable operational parameter is a speed of the text-to-speech engine, which is temporarily reduced in response to the monitored environmental conditions to increase the intelligibility of the audible output to the user. 19. The communication system of claim 15 , wherein the processing circuitry is configured to monitor a proximity of the user to another user by detecting a presence of a wireless signal transmitted by a device of another user.