Class A pods reduce speech level by 30–33 dB (DS,A). Class B pods reduce speech level by 25–30 dB. Both guarantee speech privacy in typical office environments with 40–50 dB ambient noise levels. Class A pods provide higher acoustic isolation, which becomes relevant in quieter office environments, regulated industry confidentiality contexts, and situations where the highest available performance standard is required. HIGHKA pods are certified to Class A at 35 dB.