The DS,A = 29.4 dB speech level reduction measured under ISO 23351-1 represents the inherent acoustic performance of the pod structure itself — it is measured under standardised conditions that represent the pod in a reflective room. In practice, smaller offices with hard floors and walls may have slightly higher ambient reverberation, which can affect the perception of sound outside the pod (more reflected energy). The bidirectional isolation performance of the pod itself is determined by its construction and remains consistent regardless of the surrounding room acoustics.