No office phone booth or meeting pod is soundproof. They are acoustically rated and offer a level of speech privacy.

The level of speech privacy in any situation is determined by the sum of the background noise. To illustrate the privacy rating is shown as a percentage where 0 is no privacy and 100 is a high level of privacy.

The privacy rating is calculated by the person speaking voice level, sound attenuation between the talker and the listener, and their local environment and the interference of other surrounding noise at the listener. In the image above, it shows that the users of an office meeting pod, if placed in a busy office will have a high level of privacy compared to those outside.

Ambient noises cause sensory disturbance between people and result in reduced speech privacy. It’s very similar to when the sound of a pub's music is so loud that it makes you raise your voice to be heard.