The DS,A = 29.4 dB performance is a property of the pod’s construction, not its position. ISO 23351-1 testing measures the pod’s inherent acoustic isolation under standardised conditions. Position affects the starting ambient level (which determines the resultant interior level) but not the pod’s isolation performance itself. A pod in a 70 dB ambient achieves approximately 41 dB interior; the same pod in a 60 dB ambient achieves approximately 31 dB interior. Both represent the same DS,A = 29.4 dB reduction.