Microsoft Teams has recently introduced spatial audio for video calls, following in the footsteps of Apple’s FaceTime with macOS Monterey. Spatial audio is designed to create the illusion that participants in a video call are physically positioned in the space shown on the screen, making their voices appear to originate from that location.
According to Microsoft, this feature goes beyond being a mere gimmick. It enhances the overall video call experience by making it easier to track who is speaking, reducing meeting fatigue, and improving the understanding of conversations when multiple speakers are talking simultaneously.
The challenge in creating realistic and engaging audio and video experiences lies in simulating real-world scenarios. Our brains rely on binaural hearing, which uses both ears to identify and differentiate sounds in the physical environment. However, most audio and video communication applications currently provide monophonic audio, where speech signals from different participants are transmitted through a single audio channel, thereby eliminating valuable spatial context.
Microsoft Teams Spatial Audio addresses this issue by aligning the perceived audio location of each participant with their video representation. This alignment improves the ability for users to identify who is speaking, understand multiple simultaneous speakers more easily, and reduce cognitive load during meetings.
An experiment called The Cocktail Party Effect conducted in the 1950s demonstrated that directional audio, particularly when using headphones, is essential for focusing on a single voice in a crowded environment. Microsoft recommends using headphones, especially those that support spatial audio, for the best experience during spatial audio video calls.
It is worth noting that wired headphones or wireless headphones that have spatial audio support are required. Recent models of AirPods, for example, are compatible with this feature. However, Microsoft’s own Surface Earbuds and Surface Headphones 2 do not support spatial audio.
By introducing spatial audio for video calls, Microsoft Teams aims to enhance the overall meeting experience for users, contributing to more efficient and engaging virtual collaborations.
