United Kingdom · CAP Code · landing pages
Noise level decibel claims on UK landing pages — CAP literacy
Appliance and power-tool landing pages show dB(A) figures, sound-power levels and whisper-quiet heroes beside lifestyle photography. Shoppers often read decibel numbers as comfort guarantees without opening test footnotes. This guide helps UK marketers inventory noise strings on live URLs. Not ASA clearance and not legal advice.
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Decibel heroes on appliance and tool pages
Vacuum cleaners, heat pumps and power tools landing pages stack dB(A) figures, sound-power levels and ultra-quiet headlines beside lifestyle photography. Shoppers often treat the decibel number as a household comfort guarantee without opening test footnotes.
Under CAP Code 3.7, objective performance claims need substantiation — marketers inventory exact noise strings before seasonal campaigns.
Cross-read energy efficiency rating claims, battery life duration claims, and water resistant claims.
Common noise level patterns
| String | Shopper read | Register note |
|---|---|---|
| 68 dB(A) in use | Measured noise | Capture test standard if stated |
| Whisper-quiet operation | Subjective comfort | Pair with numeric row if present |
| 50% quieter than previous model | Comparative saving | Log baseline SKU |
| Sound power level 62 dB | Lab metric | Do not merge with dB(A) row |
| Ideal for open-plan homes | Outcome implied | Separate from measured dB |
Test standards and modes
Manufacturers test eco mode, turbo mode and empty load differently. CAP literacy expects the advertised dB figure to match the mode described in the hero.
Bundle modules may show a quietest-in-range claim without naming which model was tested — log variant tables separately.
See comparative vs competitor claims and results may vary disclaimer.
Worked example
Hero: “Only 62 dB(A) on standard mode — tested to IEC 60704.” Spec tab repeats figure on model VC-400. Literacy notes:
- dB(A) figure: Objective — evidence folder should match sold SKU and mode.
- Standard named: IEC 60704 — archive report filename in register.
- Turbo mode: Higher dB in table — ensure ads reference correct mode.
- Retailer feed: Says quietest vacuum — reconcile superlative scope.
Common misreadings
- Quiet branding assumed to prove dB level. Log explicit measurement.
- Energy label icon merged with acoustic row. ERP and noise are separate claims.
- Clearance SKU excluded from hero scope. Variant tables should list outlet models.
- Installer noise copy treated as product dB. Whole-system claims need separate evidence.
Desk checklist
| Check | Pass hint |
|---|---|
| Hero matches spec table dB | Same mode and figure |
| Test standard cited | Matches evidence file |
| Comparative quieter claims scoped | Baseline named |
| Marketplace feed logged | Separate register row |
| Health claims crossover | Health claims on PDPs |
Health and sleep marketing crossover
Sleep better and nursery-safe language beside dB heroes can imply health outcomes — inventory outcome copy separately from measured noise rows.
Hypoallergenic and fragrance-free claims on the same URL concern different CAP themes — split register rows.
See hypoallergenic claims and fragrance-free claims.
Video and social cut-downs
Short-form video may voice-over quietest on the market without naming the tested model — log broadcast copy as its own register row.
Influencer demos in furnished rooms are not laboratory dB tests — separate UGC from objective hero figures.
See influencer endorsement claims and testimonials not substantiation.
Register hygiene reminder
Rescan after firmware updates change fan curves — dB mismatches appear when heroes still cite launch-test reports.
Archive acoustic report PDF filenames even when shoppers only see a single dB integer on mobile.
See claim substantiation and before and after URLs same claim.
Professional and B2B listings
Trade pages sometimes show indicative dB without naming duty cycle — log B2B and consumer URLs separately when the same SKU appears on both.
Hire fleet pages may reuse consumer quiet heroes on different motor batches — schedule rescans after fleet refreshes.
See industry-leading trusted-by claims when quietest-in-class language appears without decibel proof.
Smart home and app-controlled modes
Connected appliances may advertise quiet night mode in app screenshots while the PDP hero cites standard-mode dB — log app store copy separately from web heroes.
Firmware release notes that change fan speed maps should trigger a CiteBefore rescan even when the physical SKU code stays unchanged.
See subscription auto-renewal claims when quiet operation is bundled with cloud service upsells on the same landing page.
Seasonal retail and bundle listings
Christmas gift guides may quote quietest stocking filler without linking to the tested PDP — register gift-guide URLs separately from core product heroes.
Multi-pack listings sometimes average dB across mixed models — log each SKU row when bundle titles imply a single noise figure.
See free gift with purchase claims and installment buy now pay later claims when finance modules sit beside dB heroes.
Questions
Are decibel figures objective claims on a landing page?
dB(A) and sound-power levels are measurable — CAP literacy expects substantiation for stated noise levels and test conditions.
Must noise heroes match the label on the physical product?
Shoppers expect consistency between hero dB figures, spec tables and in-box energy labels. Log each surface separately.
Does CiteBefore verify acoustic laboratory tests?
No. CiteBefore inventories visible copy on submitted URLs. Test certificates remain your compliance folder.
Can quiet icons substitute for named decibel values?
Whisper-quiet lines without numbers may still imply measured performance — inventory explicit dB strings.
Do comparison charts need baseline products named?
Comparative quieter-than claims usually need identifiable baselines — log chart footnotes in the register.
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