Station 5 of 13 · Perception · a tool

The Sensory Calibration Lab

The site cannot send you a smell, so the materials are yours: eight comparison drills built from the records, a place to write down what you perceive, and a profile of the distinctions you make reliably. Without materials to hand, train the vocabulary instead.

Self-reported · modeled A learning exercise, not a smell test or a diagnosis. The site cannot emit smells or check what you smelled: the answers are what you report, and every reading drawn from them is modeled.

Recording answers needs JavaScript, which is off or has not loaded. The drills below work without it as a worksheet: print the page (each drill carries a table to fill in by hand) and work through them with a pencil.

The drills

Eight drills, from the distinctions the house’s vision names (rose or geranium, citronellol or geraniol, orris or violet, different woods, different musks) and from what the records already compare. Under each sample, the words its record files, each with its evidence; a sample that is not on record yet says so.

01 Rose or geranium

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A rose (otto, or an absolute)

    • honey (“honeyed”)
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • spicy
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • floral
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    Extraction on record: steam distillation (perfumery convention)

  • B geranium oil not on record

    There is no geranium record yet, so the site gives no words for it. Your own words for it are kept in your profile all the same.

On record, the words that part them

Fewer than two samples have words on record, so the records cannot say what parts them; your own words are the comparison.

house interpretation Smell the rose and name what you find; then smell the geranium. Notice which of the rose's words you would also give the geranium, and which you would not.

Worksheet: Rose or geranium (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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02 Citronellol or geraniol

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A citronellol

    • soapy
      documented

      β-citronellol | CAS 106-22-9, 1117-61-9, 7540-51-4 | Odor quality: soapy, rose-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

    • rose (“rose-like”)
      documented

      β-citronellol | CAS 106-22-9, 1117-61-9, 7540-51-4 | Odor quality: soapy, rose-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

  • B geraniol

    • rose (“rose-like”)
      documented

      geraniol | CAS 106-24-1 | Odor quality: rose-like, citrus-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

    • citrus (“citrus-like”)
      documented

      geraniol | CAS 106-24-1 | Odor quality: rose-like, citrus-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

On record, the words that part them

house interpretation Both are filed as rose-like, and both occur in the rose oils on record. The words that part them on record are listed below; check whether you find the same split.

Worksheet: Citronellol or geraniol (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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03 Orris or violet

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A orris butter

    • violet (“violet-like”) via α-irone
      documented

      The orris resinoid is obtained by benzene extraction or using petroleum ether from comminuted dried rhizomes; cis-γ-irone and cis-α-irone are the compounds responsible for the violet-like scent [162].

      GC-4 · Crișan I

      GC-4: cis-γ-irone and cis-α-irone are “the compounds responsible for the violet-like scent”

    No words of its own on record; these are its constituents’ words, as filed on their records.

    Extraction on record: steam distillation (documented)

  • B an ionone (alpha- or beta-ionone) not on record

    There is no ionone record yet. The event record of 1893 dates the synthetic ionones, which it calls violet and woody.

On record, the words that part them

Fewer than two samples have words on record, so the records cannot say what parts them; your own words are the comparison.

house interpretation The orris butter has no words of its own on record; its violet-like word comes through its irones. Notice what the orris carries besides violet, if anything, and whether the ionone seems the plainer of the two.

Worksheet: Orris or violet (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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04 Three woods

3 samples · chance of a right answer by guessing: 1 in 3 (which is it), 1 in 3 (odd one out)

  • A sandalwood oil

    • creamy
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words; no descriptor source is filed

    • milky
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words; no descriptor source is filed

    • sweet
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words; no descriptor source is filed

    Extraction on record: steam distillation (perfumery convention)

  • B vetiver oil

    • smoky
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words; no descriptor source is filed

    • rooty
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words; no descriptor source is filed

    Extraction on record: hydrodistillation (documented)

  • C Iso E Super

    • woody (“woody, old-wood”)
      documented

      Iso E Super® (33) | 59056-94-9 | woody, floral, ambergris, violet, old-wood, lemony (500 ng L−1)

      ISO-2 · Stepanyuk A, Kirschning A

      the descriptors of Table 1 of the review for rac-33

    • floral
      documented

      Iso E Super® (33) | 59056-94-9 | woody, floral, ambergris, violet, old-wood, lemony (500 ng L−1)

      ISO-2 · Stepanyuk A, Kirschning A

      the descriptors of Table 1 of the review for rac-33

    • ambergris
      documented

      Iso E Super® (33) | 59056-94-9 | woody, floral, ambergris, violet, old-wood, lemony (500 ng L−1)

      ISO-2 · Stepanyuk A, Kirschning A

      the descriptors of Table 1 of the review for rac-33

    • violet
      documented

      Iso E Super® (33) | 59056-94-9 | woody, floral, ambergris, violet, old-wood, lemony (500 ng L−1)

      ISO-2 · Stepanyuk A, Kirschning A

      the descriptors of Table 1 of the review for rac-33

    • lemony
      documented

      Iso E Super® (33) | 59056-94-9 | woody, floral, ambergris, violet, old-wood, lemony (500 ng L−1)

      ISO-2 · Stepanyuk A, Kirschning A

      the descriptors of Table 1 of the review for rac-33

On record, the words that part them

house interpretation Three strips, three kinds of woody. Cedarwood is not on record yet; if you own it, note your words for it on paper and compare them with these three.

Worksheet: Three woods (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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2
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05 Two musks

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A musk ketone, or another nitro musk you own

    • musky
      perfumery convention

      Typically, musk odorants are sweet, waxy, and “animalic”, bringing warmth and erogenous mystery to a perfume

      KLE-1 · Kleoff M, Kiler P, Heretsch P

      the family word: the review describes musk odorants in general, not this molecule

  • B a musk of another kind you own (a macrocyclic or a polycyclic musk) not on record

    No record of these musks yet; the descriptor record words the family as a whole.

On record, the words that part them

Fewer than two samples have words on record, so the records cannot say what parts them; your own words are the comparison.

house interpretation If a strip seems to have little or no smell, record intensity 1 and say so: that is a result too, not a failure.

Worksheet: Two musks (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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2
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06 Vanillin or ethyl vanillin

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A vanillin

    • vanilla (“vanilla-like”)
      documented

      4-hydroxy-3-methoxybenzaldehyde (vanillin) | CAS 121-33-5 | Odor quality: vanilla-like, sweet

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

    • sweet
      documented

      4-hydroxy-3-methoxybenzaldehyde (vanillin) | CAS 121-33-5 | Odor quality: vanilla-like, sweet

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

  • B ethyl vanillin not on record

    No ethyl vanillin record yet; the words on record are vanillin's.

On record, the words that part them

Fewer than two samples have words on record, so the records cannot say what parts them; your own words are the comparison.

house interpretation Smell them at the same dilution, or the stronger one will simply seem different. Notice whether the difference is one of kind or of strength alone.

Worksheet: Vanillin or ethyl vanillin (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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07 Lavender or lavandin

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A fine lavender oil

    • sharp (“sharper”) via linalool
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words, set against linalyl acetate; no descriptor source is filed

    • medicinal (“more medicinal”) via linalool
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words, set against linalyl acetate; no descriptor source is filed

    • refined via linalyl acetate
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words for the ester in fine lavender; no descriptor source is filed

    • sweet (“slightly sweet”) via linalyl acetate
      house interpretation

      the house’s own reading, labelled as such

      the house essay’s words for the ester in fine lavender; no descriptor source is filed

    • floral via α-terpineol
      documented

      α-terpineol | CAS 98-55-5, 7785-53-7, 10482-56-1 | Odor quality: floral, citrus-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

    • citrus (“citrus-like”) via α-terpineol
      documented

      α-terpineol | CAS 98-55-5, 7785-53-7, 10482-56-1 | Odor quality: floral, citrus-like

      OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M

    No words of its own on record; these are its constituents’ words, as filed on their records.

    Extraction on record: steam distillation (documented)

  • B lavandin essential oil

    • camphoraceous (“very camphoraceous (très camphrée)”)
      documented

      Si l’on compare avec la lavande fine, son huile essentielle est de moins bonne qualité, car elle est très camphrée.

      HV-4 · Rosati-Marzetti C

      the heritage record’s word, comparing it with fine lavender’s oil

    Extraction on record: steam distillation (documented)

On record, the words that part them

house interpretation The heritage record on file compares the two oils and calls lavandin's very camphoraceous. Notice whether the camphor is what tells them apart for you.

Worksheet: Lavender or lavandin (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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08 One rose, two extractions

2 samples · chance of a right answer by guessing: 1 in 2 (which is it), 1 in 3 (odd one out)

  • A rose otto

    • honey (“honeyed”)
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • spicy
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • floral
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    Extraction on record: steam distillation (perfumery convention)

  • B rose absolute

    • honey (“honeyed”)
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • spicy
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    • floral
      house interpretation

      the house’s own reading, labelled as such

      the house’s own wording on the /materials rose card; a descriptor vocabulary with a convention source is later work (A_MASTER_PRODUCT_SPEC §3 Odor Descriptor)

    Extraction on record: solvent extraction (perfumery convention)

On record, the words that part them

house interpretation On record the two carry the same words; what differs is the route out of the petal, distillation or solvent extraction. Notice whether the difference you find has a word in the vocabulary.

Worksheet: One rose, two extractions (fill in by hand)
TrialStripYour answerIt wasIntensity 1–5Your words
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2
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Without materials: the vocabulary

The drills ask for words from the house vocabulary of 44 odour descriptors. Match a definition to its word, then look the word up on its record.

The vocabulary: every descriptor on record, by family (after the published classifications), with the house definition and the molecules and materials that carry it.
WordDefinitionCarried on record by
aldehydic
aldehydicThe fizzy, waxy, soapy sparkle of the fatty aldehydes. (house interpretation)Chanel N°5, Arpège
amber
amberIn perfumery, a warm, resinous, sweet accord (labdanum, vanilla), not the fossil resin. (house interpretation)labdanum absolute, amber notes, Shalimar, L'Origan, Tabu
ambergrisThe smell of ambergris: marine, musky, woody and a little sweet. (house interpretation)Iso E Super
aromatic
hayThe sweet, dry smell of drying grass, as of coumarin and tonka. (house interpretation)Coumarin
balsamic
balsamicWarm, resinous and sweet, as of balsams, resins and benzoin. (house interpretation)labdanum absolute, frankincense
pineyThe resinous, green smell of pine needles and pine resin. (house interpretation)frankincense
vanillaThe smell of cured vanilla pods: sweet, creamy and warm. (house interpretation)vanillin
citrus
citrusThe bright, zesty smell of citrus peel oils such as bergamot and lemon. (house interpretation)methyl dihydrojasmonate, α-terpineol, geraniol, bergamot essential oil, Eau de Cologne Impériale, Eau Sauvage
lemonyCitrus narrowed to lemon: sharp, clean, a little sour. (house interpretation)Iso E Super, frankincense
floral
floralThe smell of flowers in general; the heart of many perfumes. (house interpretation)Iso E Super, methyl dihydrojasmonate, α-terpineol, 2-phenylethyl alcohol, jasmine absolute, rose absolute, rose otto
jasmineThe smell of jasmine flowers: rich, sweet and floral, with a heady depth. (house interpretation)Benzyl acetate
lilyThe smell of lily flowers; a fresh, sweet, watery floral. (house interpretation)butylphenyl methylpropional
muguetLily of the valley: a fresh, green, dewy floral that the flower itself does not yield as an oil. (house interpretation)Diorissimo
narcoticHeady and overpowering, the dense sweetness of white flowers; an evaluator’s word, not a pharmacological one. (house interpretation)indole, jasmine absolute
roseThe smell of the rose flower: floral, a little fruity and honeyed. (house interpretation)β-damascenone, citronellol, geraniol
violetThe powdery, woody-floral smell of violets (and of orris). (house interpretation)Iso E Super, α-irone
fruity
fruityThe smell of ripe fruit, from berry to apple to plum. (house interpretation)β-damascenone
jammyCooked, concentrated fruit: fruity with a sugary depth. (house interpretation)β-damascenone
green
greenThe smell of cut leaves, stems and grass: sappy, sharp and vegetal. (house interpretation)Vent Vert, Miss Dior
herbaceous/herbal
camphoraceousThe cool, medicinal-herbal smell of camphor, as in lavandin. (house interpretation)lavandin essential oil, the green odorants of the review
moss/leather/animalic
animalicWarm, skin-like and faintly dirty, as of musk, civet or indole. (house interpretation)jasmine absolute, musk odorants
fecalThe frankly animal smell of indole at high concentration. (house interpretation)indole
leatheryThe smell of tanned leather: smoky, dry and animal. (house interpretation)Tabac Blond
mossyThe damp, earthy, forest-floor smell of oakmoss. (house interpretation)oakmoss absolute
tobaccoThe sweet, dry, hay-like smell of cured tobacco leaf. (house interpretation)sclareolide
musk
muskyThe soft, warm, skin-like smell of musks, natural or synthetic. (house interpretation)Musk ketone, musk odorants
waxyThe smooth, fatty smell of wax; said of musks and some aldehydes. (house interpretation)musk odorants
spicy
pepperyThe sharp, dry prickle of peppercorns. (house interpretation)agarospirol
spicyThe smell of kitchen spices: warm (clove, cinnamon) or cool (pepper, cardamom). (house interpretation)Coumarin, agarospirol, rose absolute, rose otto, L'Heure Bleue
wood
creamySoft, rich and rounded, as of sandalwood; a texture word. (house interpretation)sandalwood oil
milkyLactonic and soft, as of warm milk; said of sandalwood. (house interpretation)sandalwood oil
rootyEarthy and damp, as of roots dug from the soil; said of vetiver. (house interpretation)vetiver oil
smokyThe smell of smoke and burnt wood. (house interpretation)vetiver oil
woodyThe smell of wood: dry, warm or resinous, from cedar to sandalwood. (house interpretation)Iso E Super, agarospirol
a quality, not a family
brightLifted and sparkling, the quality of a top note that seems to catch the light. (house interpretation)Limonene
freshA cool, clean, airy impression, the opposite of warm or heavy; used across families. (house interpretation)methyl dihydrojasmonate, Limonene, bergamot essential oil
honeyThe warm, waxy sweetness of honey; also "honeyed". (house interpretation)2-phenylethyl alcohol, rose absolute, rose otto
medicinalThe smell of remedies and antiseptics, as of thymol. (house interpretation)linalool, thymol, from thyme
powderySoft, dry and cosmetic, like face powder; often of orris, musks and coumarin-like notes. (house interpretation)phthalide
refinedSmooth and polished, with its rough edges taken off; an evaluator’s word. (house interpretation)linalyl acetate
sharpEdged and pointed rather than round; said of a material that cuts through a blend. (house interpretation)linalool
soapyClean and waxy, the smell of soap. (house interpretation)citronellol
sweetThe impression of sweetness a smell gives, as of sugar, vanilla or honey. (house interpretation)Coumarin, butylphenyl methylpropional, linalyl acetate, vanillin, sandalwood oil
upliftingAn effect word for a lively, energising top note rather than a smell of its own. (house interpretation)Limonene

How it works

  1. Prepare. Use only materials you already own and already know how to handle: smell each one from a paper smelling strip, never from the bottle, diluted the way you usually smell it, and follow its safety data sheet. Leave out any material you are unsure about. Number the backs of the strips, or ask someone to code them for you, so you cannot see which is which while you smell.
  2. Which is it? Take one coded strip, smell it, and choose which sample you think it is; give its intensity and any words that fit. Then turn it over (or ask your helper) and record what it really was. Guessing alone is right 1 time in 2 for a pair, 1 in 3 for three samples.
  3. Odd one out. Three coded strips, two of one sample and one of another. Choose the strip that differs, then record which it really was. Guessing alone is right 1 time in 3.
  4. The reading (modeled). After at least 5 trials of a drill, the lab works out the chance of getting at least as many right by guessing alone. At 1 in 20 or less it reads “reliably told apart in these trials”; better than the guessing average but above 1 in 20, “better than guessing, not yet reliably”; otherwise “not told apart yet”.
  5. Your words (modeled). For each sample, how far the word sets you gave it overlap from trial to trial (consistent, partly consistent, varies), and how many of your words are also on its record. The records are conventions and the house’s readings, not right answers: a word of yours that is not on record is not wrong.
  6. What it does not do. A learning exercise, not a smell test or a diagnosis. The site cannot emit smells or check what you smelled: the answers are what you report, and every reading drawn from them is modeled. It gives no score of your sense of smell, compares you with nobody, and says nothing about health. A result reflects your materials, their dilution and the day as much as your nose.

What is kept, and where

  • Without the box ticked, nothing is written anywhere: your answers live in the open page and are gone when you close it.
  • With “Keep my results on this device” ticked, the lab writes one entry, radler.calibration.v1, to this browser’s local storage: your answers, the session number and the date (no time, no name, nothing about your device). It stays until you untick the box, press “Delete my results”, or clear the site’s data in your browser.
  • Export makes a file on your device (JSON, or plain text); loading a file reads it in this page. Neither sends anything: the lab makes no network request with your results, and the site has no account to send them to.

Sources

  1. GC-4 · Crișan I. The Genus Iris Tourn. ex L.: Updates on Botany, Cultivation, Novel Niches and Impactful Applications. Plants (Basel) 2025;14(18):2870. DOI 10.3390/plants14182870. PMID 41012022. PMCID PMC12473546. doi.org/10.3390/plants14182870 · read 2026-09-30 · CC BY (open access, MDPI, as the article states); short quotes only, the text is not filed
  2. HV-4 · Rosati-Marzetti C. (anthropologist), “Les pratiques de culture des lavandes dans les Alpes-de-Haute-Provence”, Fiche d’inventaire du patrimoine culturel immatériel, Ministère de la Culture (France), fiche no. 2018_67717_INV_PCI_FRANCE_00418, ARK ark:/67717/nvhdhrrvswvk2ml, submitted 12 December 2018 (fieldwork February–August 2018). www.culture.gouv.fr/Media/Thematiques/Patrimoine… · read 2026-09-30
  3. ISO-2 · Stepanyuk A, Kirschning A. Synthetic terpenoids in the world of fragrances: Iso E Super® is the showcase. Beilstein J Org Chem. 2019;15:2590–2602. doi.org/10.3762/bjoc.15.252 · read 2026-09-30 · CC BY 4.0
  4. KLE-1 · Kleoff M, Kiler P, Heretsch P. Synthesis of odorants in flow and their applications in perfumery. Beilstein J Org Chem. 2022;18:754–768. doi.org/10.3762/bjoc.18.76 · read 2026-09-30 · CC BY 4.0
  5. OT-1 · Kreissl J, Mall V, Steinhaus P, Steinhaus M. Leibniz-LSB@TUM Odorant Database, Version 1.2. Leibniz Institute for Food Systems Biology at the Technical University of Munich: Freising, Germany, 2022. www.leibniz-lsb.de/en/databases/leibniz-lsbtum-o… · read 2026-09-30 · free of charge; scientific use encouraged with full acknowledgement; systematic download or reproduction needs written permission (its copyright page, read 2026-09-30): single values are cited with their references, the responses are not filed

The drills and vocabulary as data are published under CC BY 4.0: /data/calibration/calibration.json.

version 1 · updated 2026-09-30