No pod — regardless of acoustic specification — creates absolute silence. What ISO 23351-1-tested pods like HIGHKA provide is a verified reduction of 29.4 dB in speech-range frequencies (DS,A). In practice, this means household conversation in an adjacent room becomes acoustically indistinct inside the pod — you may sense that sound is present, but speech is no longer intelligible. For the primary home office use cases of focused work and video calls, this level of reduction is highly effective: your call participants will not hear household noise bleed-through, and your own concentration will not be disrupted by intelligible household speech.