A method for adjusting sound data that is transmitted between a first client and a second client is disclosed. The sound data may adjusted or an adjustment indicator that indicates how to adjust the sound data may accompany the sound data. The method comprises determining a proximity between the clients; adjusting the sound data based on the determined proximity; and transmitting the adjusted sound data. The determined proximity may be the physical proximity between the clients or a virtual proximity between virtual representations of the clients. Rules for adjusting sound data based on proximity indicate how to adjust sound characteristics, such as, but not limited to volume and frequency. The rules may also take into account environmental factors such as atmospheric and aquatic environmental factors.