LectroFan Classic White Noise Machine

Pros

• +Non-looping, digitally generated white and fan sounds avoid the tell-tale repeat loop that makes cheaper machines fatiguing over a full workday
• +Listed speech-privacy use case — the broadband hiss raises the noise floor so a partner's call words blur into unintelligibility a few feet away
• +Palm-sized footprint slots onto a shelf between the two zones without claiming any desk space
• +Built-in timer lets it run through the calls and switch off on its own
• +One of the lowest-cost ways to add speech privacy between two desks — cheaper than a good headset for each person

Cons

• −Masks speech intelligibility rather than silencing the room — the other voice is still there, just harder to parse
• −One unit covers roughly one zone; a large or long room may want a second machine per desk
• −No battery — it needs a nearby outlet, so placement is tied to power
• −Constant broadband hiss is not to everyone's taste; some people find any steady sound distracting during deep focus