Our standard: Every page on VoiceRangeTest.com should be accurate, useful and honest about uncertainty. Harlow researches, checks and approves all content, tool descriptions must match what the tool code really does, and errors are corrected when reported.
These guidelines cover the guides, the singer vocal-range analyses and the text that explains each tool. They say how facts are sourced, how uncertainty is shown, how AI software may be used and how corrections work. Harlow, who runs the site, is responsible for all published content.
Principles
- Accuracy: material claims need evidence that suits the claim.
- Context: a measurement or a voice-type label is shown with what it can and cannot tell you.
- Transparency: estimates, methods and limits are explained, not hidden.
- Usefulness and originality: a page must help the reader do or understand something, not repeat other sites.
- Care: health, safety and privacy statements get extra checking.
Sources and how much weight they get
- Primary and official sources: standards bodies, government health agencies, original research and official technical documentation (for example, browser API documentation for how microphone access works).
- Established educational sources: university material, recognised textbooks and professional voice-teaching references.
- Supporting evidence: recordings, documented performances and first-party interviews.
- Leads only: forums, social posts, range databases and AI answers can point to something worth checking, but never count as proof on their own.
Singer vocal-range analyses
Ranges quoted online for the same singer often disagree, because they mix live transpositions, studio effects, backing vocals, screams and one-off notes. Our analyses, such as Adam Lambert’s vocal range or the highest vocal ranges, compare recordings and credible references and keep three things apart: the range a singer uses regularly, notes that are documented but rare, and claims that cannot be verified. Where sources conflict, the article says so rather than picking the biggest number.
Voice types and classification
Voice type depends on more than the lowest and highest note: tessitura, timbre, vocal weight, register transitions, training and repertoire all matter. So tool results and articles present a range-based voice type as an estimate. Reference ranges come from one published source on the site, the vocal range chart (for example tenor C3–C5 and baritone A2–A4), and the Voice Type Test uses the same numbers. Background reading: types of vocal ranges, the Fach system and SATB choir ranges.
Tool pages must match the code
If a page describes an algorithm, a threshold, a score or a privacy behaviour, that description has to match the tool that is live. Before publishing, Harlow checks tool text against the tool’s code and its test report; the process is in our testing methodology. For example, the privacy wording across the site was checked against every tool script on 27 September 2026: no tool contains code that uploads or records audio, so any older wording that suggested otherwise was corrected in the privacy policy.
Showing how certain a statement is
Pages separate established facts and musical conventions (A4 = 440 Hz, an octave doubles the frequency) from tool measurements, estimates, reported values and interpretations. A number shown with decimals is not presented as more exact than the microphone allows; the reasons are explained in accuracy and limitations.
Health and safety content
The site is educational and never diagnoses. Guidance on vocal strain, rest or pain relies on official health sources and stays general, such as the NIDCD’s voice, speech and language information. Readers with pain, lasting hoarseness or a sudden change in their voice are pointed to a qualified professional, and the disclaimer sets out these limits.
Use of AI and software
AI tools may help organise research notes, suggest outlines, restructure drafts, flag unclear sentences or proofread. AI output is never treated as a source: every material fact is checked against independent evidence, and Harlow reviews and approves the final text. We do not use automation to mass-produce thin pages.
Originality and links
We do not copy, scrape or lightly rewrite other sites, and we do not pad pages to reach a word count. Quotations are short and credited. Internal links are added when they help the reader take a next step; external links go to primary or official sources that support a specific claim, and a link is not an endorsement.
Independence and advertising
The site is funded by display ads served by Journey by Mediavine. Advertisers do not see content before publication and have no influence on articles, rankings or tool results, and ads are not endorsements. VoiceRangeTest.com has no affiliate links. If a commercial relationship is ever added, it will be disclosed on the page where it applies. The site is not the official voice of any singer, label or school it mentions.
Corrections and updates
Spelling and formatting fixes are made quietly. An error that changes a fact, a number, a method or safety advice is corrected promptly, and a note may be added to the page. Pages are reviewed when a tool changes, when new evidence appears, or when a reader reports a credible problem. A “last reviewed” date changes only after a real review.
Send corrections to contact@voicerangetest.com or through the contact page. Common questions are answered in the FAQ, and the site’s background is on the about page.
Last reviewed: 27 September 2026