WATCHDOG
Honest, evidence-rated verdicts on popular sound-wellness claims. Findings change — so our verdicts change with them.
OverhypedDoes 40 Hz sound cure Alzheimer's at home?
Real lab research, wildly oversold. Human trials are tiny, and phone speakers likely cannot reproduce the lab effect.
MixedDo binaural beats tune your brainwaves?
A modest calming/anxiety effect shows up in studies, but beats do not reliably entrain brain oscillations. The effect may be real while the brainwave story is wrong.
FalseDoes 528 Hz repair your DNA?
The flagship "miracle tone." No mechanism, no evidence. DNA does not have a resonant healing frequency.
FalseIs 432 Hz the natural, healthier tuning?
A tuning preference dressed up as physics. No health effect over standard 440 Hz has ever been shown.
MixedDoes humming heal you via nitric oxide?
Humming really does raise nasal nitric oxide ~15x. But a 2024 study found that boost did not improve mood or thinking. Mechanism real, benefit unproven.
FalseDoes the brown note make you lose control?
No secret frequency does that. Tested, busted — and your phone cannot even produce sub-20 Hz.
FalseIs the Mozart effect real?
A tiny, temporary spatial-task blip in 1993, inflated into a myth. Meta-analyses found it does not hold.
Mostly trueDoes slow breathing actually work?
Solid evidence. Breathing at ~6/min raises heart-rate variability and calms the nervous system. Each person's resonance rate varies slightly.
MixedDoes pink noise improve deep sleep?
The famous result used phase-locked pulses, not continuous pink noise. Replication is inconsistent. A real lab effect, not a guaranteed one.
Mostly trueDo one-minute micro-breaks actually help?
Micro-breaks reliably boost vigor and cut fatigue. But a break under ten minutes does not fully restore performance on hard cognitive tasks.