Portable sound machines manufacturer and supplier today: Here’s a practical, step-by-step way to dial in the correct volume level: Start Low: Always begin with the white noise machine’s volume turned down quite low. Simulate Speech: Have someone talk at a normal, conversational volume inside the room or area you want to keep private. If you’re testing alone, playing a podcast or talk radio at a realistic speaking level can work as a substitute. Listen From the Target Area: Position yourself where a potential listener might be – for instance, right outside the closed door, in the adjacent cubicle, or near …