The benchmark specification is ISO 23351-1 DS,A — ask any pod supplier for their independently tested DS,A figure and the name of the accredited laboratory that conducted the test. HIGHKA’s DS,A = 29.4 dB is SGS-verified. Any supplier unable to provide a named laboratory and specific DS,A value cannot make a credible acoustic performance claim. For coworking deployments where enterprise members will conduct sensitive conversations, verified acoustic performance is the non-negotiable specification.