Not directly — DS,A under ISO 23351-1 and STC are different metrics measured under different standards with different frequency weightings and test conditions. ISO 23351-1 DS,A specifically measures speech-frequency level reduction for the complete enclosure as a system, under standardised conditions. STC measures the transmission loss of individual partition elements. A room rated at STC 45 at the wall will achieve less effective isolation in practice due to acoustic flanking through HVAC, ceiling voids, and construction gaps. HIGHKA’s DS,A = 29.4 dB represents independently certified performance of the complete enclosure system — the most reliable basis for comparison.