Product testing for autistic
and sensory-sensitive adults.
Fragrance-free shampoo that start to smell the moment the shower gets hot. Earplugs that cause piston pressure in your ear canal. Noise cancelling headphones that you can’t wear because of the ‘plane suck’ pressure and hiss. All of these are tested here, in the real conditions where they fail.
New here, or recently diagnosed? Start with why some environments are hard on sensory-sensitive people.
BOST takes no sponsorship and runs no ads. If you buy through the links here, a small commission comes back to the site at no extra cost to you. That’s what keeps these investigations independent.
Which Noise Cancelling Headphones Suit Sensory-Sensitive Ears?
Eight headphones under test across six environments: quiet room, kitchen, open-plan office, commute, supermarket, and café. Timed eardrum pressure across ninety minutes, clamp force measured on balloon proxies at two head sizes, live misophonia triggers, and the self-noise each pair makes in a silent room. Four tested in batch one.
Which Earplugs Actually Work for Sensory-Sensitive Adults?
Ten products tested across seven environments: quiet room, bus, supermarket, open-plan office, café, and home kitchen. Frequency perception, canal pressure, occlusion effect, and hygiene recorded. Ten case files published.
Which “Fragrance-Free” Shampoos Are Actually Low-Scent?
Eight products. Tested in hot water, hard water conditions. Claims verified. Scent behaviour recorded. Failure modes documented.
Field note: scent intensity was assessed over three stages.
Substack
Check out the Box of Small Things Substack feed where principal investigator, Charlie N, covers the history and culture behind sensory experience, not just the products. Recent posts:
How hard do headphones actually squeeze? Ask a balloon.
We probably all have a little bit of echolocation don’t we?
“You’re being hypersensitive”
Recent case files
Investigation No. 3 Noise Cancelling Headphones
Case file — Caution
Last on cancellation, lightest under load. The long-commute pick for less.
Case file — cleared
Lowest eardrum pressure of any pair tested. The pick if pressure is what ends your sessions.
Case file — flagged
Bose QuietComfort Ultra 2nd Gen
The most expensive of the four and the hardest to recommend. Cancellation cuts out at every road bump.
→ All headphones case files · ANC Headphone testing methodology
Investigation No. 2 – Earplugs
Comparison — both case files
Same housing. The hollow filter in the Engage eliminates piston pressure on insertion, a property Loop do not document. They suit opposite environments.
Comparison — both case files
Loop Quiet 2 vs Alpine Silence
Two flanged silicone designs, one clear split. Different strengths and weaknesses discovered.
Case file — Caution
Loop Quiet 2 Silicone Earplugs
Strong overall attenuation. The occlusion effect becomes counterproductive in quieter environments and during conversation.
Case file — Caution
Hollow filter removes piston pressure on insertion. Best for conferences and supermarkets. Counterproductive in a talking open-plan office.
Case file — Flagged
But it is a bit like a medieval knight going into battle with armour only on their feet – the protection exists, it just isn’t where the problem is…
Case file — Flagged
It was time to consider if the premium model could stand where its silicone cousin fell.
Case file — Caution
Unchanged since 1907. Higher low-frequency attenuation than Loop at a fifth of the price. The handling texture is the trade-off.
Case file — Cleared
Mack’s Pillow Soft Silicone Putty
Entrance-seal design avoids the piston effect entirely. Outperforms Loop on low and high frequencies. The putty texture divides opinion.
Case file — Flagged
A flight product put through the daily-noise tests. On the ground, it had no help to offer.
→ All earplug case files · Earplug methodology
Investigation No. 1 – Fragrance-free shampoos
Case file – Cleared
Eleven ingredients. Lowest scent intrusion in the batch. Find out why this scored highest.
Case file – Caution
Explore all the characteristics of this popular ‘fragrance free’ shampoo.
Case file — Caution
Effective cleansing, low ingredient count. A medicinal odour becomes prominent at shower temperature.
Case file — Flagged
A strong warm glue-like scent releases under hot water despite the fragrance-free claim. The aloe extract is the source.
→ All 8 shampoo case files · Shampoo testing methodology
Field reports
Full, detailed reports comparing products against one another.
Headphone Field Report
Sony XM6 vs XM5 head to head
Is the upgraded Sony ANC any better?
Earplug Field Report
Earplugs for sensory overload
Overload advice for autistic, AUDHD, ADHD and sensory sensitive people.
Earplug Field Report
Earplugs for autistic shutdown and meltdown
What the testing data says about sensory overload and recovery conditions.
Earplug Field Report
Earplugs for misophonia
10 earplugs tested across 7 environments to see which help for misophonia.
Earplug Field Report
Flare Calmer vs Loop: Which Actually Quiets a Noisy Room?
The investigation tested two popular product lines to see which lived up to its maker’s claims.
Earplug Field Report
Wax vs silicone earplugs
Two materials, different strengths. Tested head to head.
Explainer
The occlusion effect, explained
Why earplugs make your own voice sound boomy, and which ones make it worse.
Shampoo Field Report
Which shampoos rinse without the squeak?
That awful squeaky feeling when rinsing shampoo – ranked.
Shampoo Field Report
Out of control foam and suds can ruin your shower. Best to worst ranked.
Lather volume and spread behaviour tested.
Shampoo Reference Guide
Ingredient sensitivity guide
8 products cross-referenced against 8 common sensitivities.
Who this site is for
You are here and have probably wasted good money on things making wild claims. This is because sensory-sensitive and neurodivergent adults are largely overlooked both by mainstream reviewers and by most manufacturers. Products labelled fragrance-free, gentle, or sensory-friendly are rarely tested against things that actually matter. Reviews on this site test products to an exacting level of detail and report what we find (including when a manufacturer claim does not hold up) to help autistic and ND people find the things that are more likely to help, not hurt.
→ About this site and how it makes money
→Frequently asked questions
How we test
- First-hand testing in real-world environments and repeatable labaratory sessions
- Manufacturer Claims checked against actual performance
- Verdicts: Cleared / Caution / Flagged
→ ANC Headphone methodology
→ Shampoo methodology
→ Earplug methodology
Investigations No. 1 and No 2. complete. Investigation 3, Noise Cancelling Headphones is now underway: how we test noise cancelling headphones for sensory sensitivity. Last updated: July 2026.