Is a white noise machine better than a phone app?

Yes — dedicated machines produce fuller, richer sound from better speakers. They do not drain your phone battery, do not get interrupted by notifications, and do not tempt you to check your phone at 3 AM. Phone apps work in a pinch, but a dedicated machine provides noticeably better sleep quality.

Is white noise safe for sleep?

Yes — white noise is safe for adults and has been used in sleep clinics for decades. For infants, keep the machine at a safe distance and moderate volume (under 50 dB at the crib). All machines in this guide can be set to safe infant volumes.

What is the difference between white, pink, and brown noise?

White noise has equal energy across all frequencies — classic static sound. Pink noise emphasizes lower frequencies — sounds like rain or wind. Brown noise is even deeper — sounds like a low rumble or ocean. Most people find pink or brown noise more soothing for sleep, while white noise is best for masking sharp, high-frequency sounds.

Best Portable White Noise Machines 2026