The quietest library may have no visitors

The last question in the interview for a library assistant post at a county library service would not concern books, databases or the public. It would be: “What is the longest period of complete silence you have personally maintained in a public building, and can you evidence it?” Candidates who answer in minutes rather than hours would not be called back.

Public libraries in many countries have been moving away from strict silence toward a community-hub model with cafés, events and children's programmes, while confining quiet to designated zones. Noise-level indicators, traffic-light-style displays that show the ambient sound level, are widely used in classrooms and are appearing in libraries and open-plan offices to nudge behaviour. Public services increasingly report performance through dashboards and league tables, and gamification, with points, streaks and rankings, has spread from consumer apps into workplaces and public institutions. Library budgets and opening hours have been squeezed in many places, pushing services to justify themselves through measurable outputs. Sensor networks that monitor occupancy, air quality and noise are becoming standard equipment in public buildings.

The question would follow from a scheme the service could adopt next year, under which every branch is fitted with ceiling-mounted sound sensors and ranked, in real time, on a leaderboard displayed in each foyer and on the council's website. Branches would be scored on average decibel level across opening hours, adjusted for floor area but not for the number of people inside. Staff would be assigned to branches on the strength of their personal silence record, which the interview question is designed to establish. The role also involves shelving.

The rationale, according to a service development manager, would be measurement. With book budgets and opening hours already reduced, the service would need an output it could still deliver in full. “Silence is the one thing we provide that does not require stock,” the manager could say. “We have always offered it. We have simply never counted it.” The manager would be the only official permitted to comment on the scheme, on the grounds that comment is noise.

The scoring would be indifferent to the source of a sound. Under the draft methodology, a cough, a page turned too eagerly and a toddler discovering the lift would count identically, in decibels, against the branch in which they occurred. Staff would be permitted to intervene but not to speak, since intervention is also audible. Branch managers would be issued with a laminated card reading “Please”, which they could hold up. The card is silent. Its effect on toddlers is not yet documented.

Within weeks of the leaderboard going live, the top position would be held, consistently, by a branch in a market town whose sensors report an average of 29 decibels, roughly the sound of a refrigerator in another room. The branch would have been closed for refurbishment since spring. The scheme's methodology does not distinguish between a silent building and an empty one, a limitation the service would concede in a footnote and describe as under review. The refurbishment could be extended.

Regular users would respond in different ways. Dennis Pallister, 71, who has read the newspapers at his branch every weekday for two decades, would be shown, on the foyer screen, the exact minute at which his sneeze moved the branch from fourth to ninth. “I asked if I could have it back,” he would say. “They said the ranking is not retrospective.” He would now read the papers in his car, with the branch's blessing, and be counted as a visit on the basis that he parks in their car park.

Others would adapt more competitively. Marta Kellow, 34, a freelance translator who works from the reference room, would describe a group chat in which regulars coordinate their breathing before the hourly reading. “There's a woman who turns off the radiator at ten to,” she would say. “Nobody asked her to. She's just very invested.” The group would have forty members and a rule that anyone caught typing on a mechanical keyboard is reported to the desk by written note. The note is folded, not passed, because passing rustles.

Children's services would be the scheme's acknowledged difficulty. Storytime, rhyme time and the summer reading challenge could be relocated to an outdoor area, a community centre or, in one proposal, the loading bay, where the sensors do not reach. Parents would be issued with a schedule of tolerance windows during which their children's presence is deducted from the score at a reduced rate. Ronan Tefft, 38, a father of two, would put it more simply. “We go to the one that's closed,” he would say. “It's top of the table. The kids love the fence.”

The interview question, meanwhile, would be revised for the second recruitment round. Candidates would no longer be asked for their longest silence but for their quietest, on the understanding that duration without a decibel figure cannot be verified. A draft guidance note would advise interviewers to sit in silence for ninety seconds after the final question and record the candidate's response. The post at the market town branch would go to the candidate who did nothing at all. She starts in January, at a building she cannot enter.