This is due to a specific neurological effect: the elimination of Induced Speech Exposure (ISE). ISE refers to the automatic activation of the brain’s phonological loop triggered by intelligible background speech. This process consumes working memory capacity, whether you are actively listening or not.
With a rating of 29.4dB, the sound level inside the pod drops below the speech intelligibility threshold, removing the trigger for ISE. The phonological loop ceases involuntary processing, and working memory is immediately freed up for core tasks. This is not a gradual mental adjustment, but an instant restoration of cognitive resources.
