The relevant standard is ISO 23351-1 DS,A — the international standard for enclosed office furniture acoustic measurement. Minimum performance for effective hybrid meeting use is DS,A ≥ 25 dB (ISO 23351-1 Class B). HIGHKA acoustic pods achieve DS,A = 29.4 dB (SGS-verified, ISO 23351-1) — approaching Class A performance. This provides bidirectional isolation: in-room call audio is clean for remote participants (inward isolation), and call conversation is contained within the pod and does not disrupt surrounding colleagues (outward isolation).