Resonance Awl

The Resonance Awl is a pointed hand tool of the instrument-makers' trade, used to score or pierce a resonant surface so that its tone may be fixed, corrected, or, in the preferred phrasing of the Resonance Technicians' Guild, "invited to settle." It consists of a tempered steel shaft, 11 to 14 centimetres in length, mounted in a hardwood handle and tipped with a tapering point ground to four facets. Unlike the heavier Sympathetic Resonance Engine, which measures floor resonance at a distance, the awl works only in contact and only at the point of contact, and it is this intimacy that has made it both indispensable and chronically controversial. Under Harmonic Resonance Protocols, Annex 7, the awl is classed as an adjusting instrument rather than a measuring one, and may not be used to certify the readings of a Sympathetic Resonance Engine or any other instrument of record.

Construction and marking

An awl's shaft is forged from a single billet and tempered to a narrow band of hardness set out in the instrument-makers' schedule appended to the Second Concordance. The four facets are ground unevenly by design: the primary facet, which does the scoring, is ground to forty degrees, while the three secondary facets are ground progressively shallower so that the tool may be rolled between the fingers to vary the depth of cut without lifting the point. Handles are turned from dense, dry stock and are not varnished, on the grounds that a polished handle transmits the work to the hand too slowly.

Each awl carries a struck mark on the primary facet, one to three millimetres behind the point, recording the maker, the year of forging, and the awl's resonance profile. Profiles are drawn from the register maintained by the Bureau of Coincidental Resonance and are inscribed by the same clerks who inscribe Resonance Dampeners. Because the mark sits where the metal is thinnest, it is frequently worn away; awls with illegible marks are termed "anonymous" and are bought and sold at a discount of roughly a third.

Use in the workshop

The awl is used chiefly in the fitting of Resonance Baffles and the tuning of small chambers, where a heavier instrument would impose its own resonance on the work. The technician seats the point, rolls the tool to select a facet, and taps the handle once with the heel of the hand. The resulting score alters the local resonance by a degree that the Office of Experimental Resonance has measured, in its 312th bulletin, as "small, but not so small as to be dismissed." Repeated scoring is discouraged. An awl that has been used more than eleven times on the same surface must be withdrawn from service and returned to the Guild for regrinding, a rule introduced after the Spiral Resonance disturbances on the lower mezzanines and still resented in several workshops.

Awls are also the standard instrument for what the trade calls "listening-in-place" — the practice of holding the point against a surface and the handle against the jawbone to feel rather than hear its resonance. The Harmonic Resonance Protocols neither endorse nor forbid the method. Clause 19 of the Fourth Concordance describes it as "a practice of the older hands," which the older hands have taken as permission and the Guild's inspectors have taken as an admission.

Dispute over classification

The principal scholarly disagreement concerns whether the Resonance Awl is an instrument of Resonance Mapping or an instrument of Resonance Damping. The Fifth Concordance, Annex 2, lists the awl among "tools that record," while Annex 2 of the Sixth Concordance, drafted nine years later by a committee that did not consult the earlier one, lists it among "tools that restrain." The practical consequence is jurisdictional: a score made with the awl is treated as a mapping record in some floors and as a damping measure in others, with the result that the same mark may be either cited as evidence or sealed over as remediation.

"An awl is a question put to a surface. A dampener is an answer given to it. The Guild has confused the two because both are pointed."

— Librarian Otho Vann, Marginalia on the Fifth Concordance, folio 44r

The Office of Experimental Resonance has declined to resolve the matter, noting in its 314th bulletin that "the classification of a tool does not alter its effect, and the effect has been measured." The Resonance Nullifiers are not implicated either way, though they are often deployed in the same rooms and are frequently mistaken for awls by visiting inspectors, a confusion the Guild has stopped correcting in writing.

The Ferrule Incident

In the winter of 411, a Guild technician named Halvern Rusk was assigned to re-score the baffle housings on the ninth gallery of the eastern stack. Rusk worked with an anonymous awl of uncertain profile and, by his own account, "a light hand." Over four days the resonance of the gallery drifted downward by a full tone and a half, and the Resonance Alerts system issued three consecutive notices before the source was traced. Rusk maintained that the drift was caused not by his scoring but by a loose brass ferrule on the housing, which he had reported and which no one had replaced. The Guild's inquiry accepted the ferrule as a contributing factor and Rusk as a contributing technician, and fined him two weeks' standing. The ferrule itself was not located and is listed as missing in the gallery's maintenance ledger, where the entry has been amended four times and now reads, in its entirety: "Ferrule. Still missing. Do not ask."

Rusk's later petition to have the awl reclassified as a damping instrument — on the theory that any tool that lowers a tone is, by definition, damping — was rejected by the Third Concordance's standing committee without reasons given. He continued to file the petition annually until his retirement, at which point the file passed to his successor, who has not opened it.

Care and prohibitions

Awls are stored point-down in a felt-lined block and are never lent across departmental lines. The Guild's workshop notice of 408 is explicit: "An awl that has scored a floor may not be carried to another floor without written dispensation." Dispensations are granted by the Resonance Clerks and are rarely sought, as the paperwork is understood to exceed the value of the tool. Points are dressed after every eighth use and are replaced after the fortieth, and the worn points are collected rather than discarded, since a scored point retains a faint profile of everything it has touched.

Under the Seventh Concordance, awls are excluded from the Tower's Resonance surveys on the grounds that their contribution is too local to appear in a whole-floor reading — an exclusion that the Office of Experimental Resonance has challenged twice and lost twice. The question of where the excluded contribution goes remains open. It is generally agreed, though nowhere recorded in the Concordances, that it goes somewhere.

See also

• Resonance Baffles
• Resonance Damping
• Emergent Resonance
• Targeted Resonance
• Designation Resonance Practice