Video conferencing and speech intelligibility


Video Conferencing is an essential feature in a commercial office fit and acoustics should always be a consideration at the early stage to ensure good speech intelligibility.

The manufacturers of conferencing systems understand the importance of the acoustic environment and specify a reverberation time (RT60) between 0.3s and 0.5s with a noise floor of 30dBA.

The cost for Video Conferencing technology can be substantial however it is important to remember that the room is part of the transmission path from the human speaker to the microphone, and from the loudspeaker to our ears.


Acoustic conditions that contribute to good speech intelligibility are

  • Low background noise levels
  • High acoustic seperation between rooms
  • Good speech privacy
  • Low reverberation times


Other Acoustic Considerations to consider at the design stage:

  • Position of the venue in relation to noise sources 
  • The shape and size of the room
  • Walls to underside of the soffit to stop flanking
  • Glazing, door and wall detail is important to stop noise and improve privacy
  • Keeping building service and mechanical noise as low as possible
  • Soft Internal furnishings to help with acoustics