Audio Technica ATND1061LK Operation Manual page 6

Audio reflection level
Rooms with few audio reflections tend to have clearer audio and allow for the talker to be detected with higher accuracy.
Rooms with a reverberation time of approximately 700 msec (RT60) are permissible, but use in rooms with longer
reverberation times is not recommended.
• Even in rooms with few audio reflections, sounds are reflected close to walls and the floor, resulting in reduced talker
detection performance.
5