Benign Drift

Benign Drift is the classification assigned to incoming sonic phenomena adjudged incapable of altering the structural or nominative integrity of Floor 707, and the least severe of the three grades established under the Dampening Protocols. It is distinguished from Anharmonic Intrusion by the absence of cumulative effect and from Targeted Resonance by the absence of an identifiable addressee. The Protocols' working definition — "any sound which arrives, does not insist, and may be left to finish" — is among the most frequently quoted clauses in the survey literature and among the least frequently applied without amendment.

Definition and Threshold

The Dampening Protocols, a subset of the Twenty-Second Concordance, classify Benign Drift by two negative tests rather than by any positive property of the sound itself. A phenomenon qualifies if it neither repeats with variation nor alters the inscription of any surface it reaches. In practice, assessors record duration in beats, deviation from expected interval in fractions of a second, and a residual figure logged in Standard Drift Units; classifications above nine SDUs are held over for the following shift. Floor 707 maintains four assessment alcoves; one is closed for draught.

Because the tests are negative, almost any sufficiently brief phenomenon passes them. The Protocols are aware of this and address it at Annex 2, which concedes that "the grade is hospitable and will admit what it should not" before declining to tighten the figures. Later commentary has treated the concession as deliberate.

Origin: The Winter Survey of Floor 707

The category was not planned. During the winter survey of Floor 707, conducted over eleven days beginning 4 Frostmonth and remembered chiefly for the loss of two thermometer stands to condensation, the surveyor Aumel Rennick recorded forty-one instances of unattributed sound and, finding none of them dangerous, declined to enter them on the adversarial schedule. Rennick's field note of the ninth day states the position plainly:

"Item twenty-nine: a humming from the west corridor, low, steady, lasting some four minutes. It stopped on its own. I have marked it benign and moved on, and I would ask that no one trouble it further."

— Aumel Rennick, Winter Survey Field Notes, entry 29

Rennick's entry 29 was copied into the Protocols as an illustrative case and remains the only field note to be so honoured. Its closing request — that the phenomenon not be troubled further — was eventually given procedural force as the Protocol of Benign Neglect, from which The Principle of Beneficial Neglect is a corollary.

Dispute Over the Negative Registers

Benign Drift is quantified in positive Standard Drift Units, a convention that the Chamber of Measured Drift has never regarded as settled. The Chamber's standing position is that benign phenomena are the residual remainder of unclassified drift and ought therefore to be entered at negative SDUs, as are Retroactive Drift and the other negative grades; the argument was put most fully in the Chamber's memorandum of 19 Ashmonth and has been reprinted in every subsequent edition of its protocols without alteration.

The Sub-committee on Nominative Drift objects that benevolent matters cannot be quantified below zero, since a negative value implies a deficit to be recovered, and nothing here requires recovery. The Registry of Lingual Drift has been asked to arbitrate three times and has each time returned the question with the note that it concerns magnitude and not naming. Assessors on Floor 707 continue to enter positive figures and to initial them twice.

The related classification of benign echoes under the Frequency Anomaly Assessment Register proceeds on the same reasoning, though the Register and the Protocols have never agreed on whether a benign echo of a benign drift is one phenomenon or two.

Interaction with Standard Drift

Benign Drift is not considered a subtype of Standard Drift, a distinction the Concordances make inconsistently. The Twenty-Second Concordance treats it as adjacent to drift but outside it; a gloss appended to the same document, of uncertain authority, calls it "the low end of the drift, where the drift does not mind." Nominative Drift and Semantic Drift, both primary subtypes of Standard Drift, are excluded from the benign grade by definition, since a nominative event alters the inscription of the thing it names and therefore fails the second test before assessment begins.

Two classes do fall inside the grade by general consent. Anti-Drift Measures, when exercised with insufficient force, produce a residue classified as benign; and the faint residue left by any drift event — known as Drift-Sheen — is benign until it settles, at which point it is reassessed under standard procedures and usually found to be lingering. Persistent sheen on Floor 707 is wiped at the turn of the shift; the cloth is returned to stores unchecked.

Recorded Cases

The register for the grade is kept in the north alcove and is not long. Its principal entries include a low hum in the west corridor lasting four minutes and eleven seconds (Winter Survey, item 29, still ongoing); a bell heard at the ninth hour on three consecutive mornings, subsequently traced to a bell; and a sound reported by two surveyors and denied by a third, entered as disputed benign and left open. A fourth case, the singing drain of Floor 708, was removed from the register after three months on the grounds that it was neither benign nor a drain.

A minor commotion followed the discovery that the bench nearest the north alcove faces the wall with a clearance of eleven inches, sized for a surveyor of Rennick's proportions and no other. The bench has not been moved.

See Also

• Dampening Protocols
• Protocol of Benign Neglect
• Tolerance for Dimensional Drift
• Ambient Footnote Drift