How Loud Is a Dog's Bark? What Kennel Dosimetry Shows

NIOSH health hazard evaluations have investigated noise in animal shelters and kennels at the request of employers or employees. The method is dosimetry: workers wear a logging instrument through their shift, with the microphone near the shoulder, and the result is a time-weighted average over the whole period.

Because NIOSH and OSHA use different criteria — 85 dBA with a 3 dB exchange rate against 90 dBA with a 5 dB rate — the same shift produces two different reported averages. The evaluations report both, which is why the same investigation can be cited with quite different-looking numbers.

A bark's level depends on the breed, the individual animal, the reason it is barking, the direction it faces, and the surroundings. A bark in a tiled corridor and the same bark in a garden are very different measurements.

There is also little practical demand for the figure. The questions people actually pursue professionally are occupational exposure in kennels and community noise complaints, and neither is answered by a single-bark level.

Nuisance rules for barking dogs are usually written around persistence and time of day rather than decibels, because the disturbance is caused by repeated intermittent events rather than by average level.

That is consistent with what sleep and annoyance research shows generally: intermittent sounds with sharp onsets disturb people more than a steady sound of the same average level.

The comparison that helps is between conditions: indoors against outdoors, window open against closed, before and after moving a kennel or a bed. Those relative results are robust.

Absolute figures for barking are the hardest case for a phone. A bark is short and peaky, and phone microphones and their processing handle transient peaks worst of all.

If the purpose is a record for a landlord, a neighbour or a local authority, timing and frequency of events over several days is far more persuasive than a peak reading, and it matches how the rules are actually written.

A kennel room is a hard-surfaced space containing many animals, and both parts matter. Tiled or concrete surfaces reflect sound rather than absorbing it, so levels build up, and barking is socially contagious — one dog starting sets others off.

This is why the documented exposures are as high as they are, and why they cannot be attributed to any single animal. The measurement describes the room, the occupancy and the working pattern together.

It also explains the interventions that facilities use: absorptive treatment on ceilings and walls, separating dogs visually so barking is triggered less often, and scheduling work so that no one person spends a whole shift in the loudest room.