Not on its US pages, not in its spec section, not on its commercial page.
That is a strange silence, because the Supersonic's origin story is acoustics: a small motor spinning fast, engineered so its tone sits above audible frequencies. That story built the modern hair dryer market. Zuvi, the light-drying challenger at $634, publishes none either; its product page, spec sheet and manual say nothing about noise. Shark we simply could not read, since its site blocked every method we had, and we say so rather than count it either way.
This is the fourth time this site has met the pattern, after Theragun, Fellowes and the Litter-Robot: the brand most identified with quiet in its category, publishing adjectives. Theragun's version is in our massage gun guide.
The challengers fill the gap. Laifen prints 59 dB with a footnote crediting third-party testing, the only outside-tested claim in the category, and Dreame prints ceilings with the measured mode named.
How many decibels is a hair dryer?
Between 57 and 62 dB for every high speed dryer with a published figure. That is a 5 dB spread across three brands and eight machines.
By this site's standards that is loud, level with our paper shredders, and it cannot be otherwise. Drying hair in minutes means hurling seventy metres per second of air through a nozzle, and moving air is noise. Our decibel chart sets 57 to 62 dB beside normal conversation.
Treat the cluster as a cluster. A decibel or two between dryer claims, none with distances or standards, is no reason to choose one machine over another. Weight, settings, price and the shape of the claim are better reasons: Dreame naming its loudest mode, Laifen naming its tester, Valera and Elchim A-weighting where everyone else writes bare dB.
Pitch is where the engineering goes
Laifen says its "motor noise is controlled above 20khz which is beyond the range of human hearing". A 110,000 rpm motor whines at very high frequencies, and pushing that whine past the adult audible ceiling leaves only the broadband rush of air, which is what the 59 dB describes. Children, and some adults, hear higher than the textbook cutoff.
Dyson pioneered the trick. It is also why a modern 59 dB dryer sounds less grating than an old 65 dB one: the level dropped a little, and the shriek left entirely.
A conventional DC motor ties the brushless flagship
Valera, a Swiss professional brand, publishes "Ultra-silent: 59 dB(A)" for its Swiss Silent Jet 7500X Light. That is Laifen's flagship number, A-weighted where Laifen's is not, from technology decades older and with no 110,000 rpm anything inside.
So you do not need a brushless dryer to get a quiet one, at least on paper. The brushless machines still win on the things that made them popular. They weigh 300 to 407 grams against Valera's 430, they dry faster per watt, and you can buy them in the US, where Valera is thin on the ground and quotes prices on request. On the published decibel, though, it is a tie, which is useful to know before paying the technology premium for quiet alone.
At the salon end, Elchim prints "Under 69 dBA" on its 1875W Anemos V2, and TYMO prints 69 on its FAQ, the stated top of the range. Sixty nine A-weighted decibels in a room of six dryers is a working conditions question. That is presumably why the professional brands are the ones that A-weight.
Ranking the claims by how much they say
Some dryer figures tell you far more than others. Highest value first:
- A figure with a named tester or a named mode: Laifen's third-party average, Dreame's loudest-mode ceilings.
- A-weighted figures: Valera and Elchim.
- Bare spec table numbers, from everyone else that prints one.
- Trademarked quietness with no number, which earns a line in also considered and nothing more.
Not one hair dryer brand here says how far its microphone sat or which standard it followed. Cross-brand gaps under about 3 dB should decide nothing. Laifen's bare 59 dB and Valera's 59 dB(A) are the same number, but not necessarily the same measurement; the decibel ratings explainer covers why the two can differ.
The other grooming tool in the same cabinet is documented even more thinly. Our hair clipper guide found only Philips printing a figure, a declared sound power of 69 dB(A) on its newer Norelco clippers and trimmers and 75 on older ones. Sound power cannot be set against the dryer figures above.
