Professional recording studios achieve acoustic isolation of 60–80 dB or more — full anechoic silence. HIGHKA pods are not recording studios; they are enclosed office environments designed for the acoustic conditions that knowledge work requires. The relevant comparison is not recording-studio standards but the threshold below which the ISE no longer significantly degrades working memory performance — which is approximately 35–40 dB interior ambient when the surrounding floor operates at 60–65 dB. HIGHKA’s DS,A = 29.4 dB brings a 65 dB open floor to approximately 36 dB inside the pod — within the range that eliminates intelligible speech as an ISE driver. This is the performance specification that knowledge work requires; higher isolation than this does not produce meaningfully different cognitive outcomes for office applications.