Turn the volume down: Noise hypersensitivity in dogs

It is commonly reported that many companion dogs are sensitive to sudden, loud noises (e.g., fireworks, thunderstorms). However, reactivities and sensitivities towards other noises in a dog’s home and environment are not well understood. This study aimed to further investigate the types of noises that evoke a negative reaction in dogs and the associated risk factors. An online survey was circulated globally through social media platforms and veterinary clinics. The survey consisted of demographic information, measures (0–100 scale) for responses to Aversive Sounds (AS; e.g., fireworks), Human Sounds (HS; e.g., coughing), and Environmental Sounds (ES; e.g., vacuum cleaner). Descriptive analyses and general linear models were conducted to determine factors associated with reactions to the different sound categories. Dogs had a significantly higher reaction score toward AS and ES compared to HS. Dogs with anxiety and of an older age showed stronger reactions towards AS. Dogs owned by females, by owners aged 65+, and dogs with anxiety showed stronger reactions to ES. No factors were associated with reaction to HS. Some guardians reported their dogs reacted at a level of 100 (scale of 0–100 where 100 is most severe) to everyday sounds, such as vacuum cleaners and coughing, suggesting significant negative effects on their welfare. Understanding the types of everyday sounds that dogs are fearful of as well as the risk factors that contribute to them can help owners improve the welfare of their dogs, as well as strengthen the human-animal bond. • Dogs respond more strongly to sounds that are aversive or environmental compared to human sounds. • Older dogs and dogs with anxiety responded more strongly to aversive sounds. • Dogs with anxiety and with older female owners responded more strongly to environmental sounds. • There is a wide range of sounds that result in strong reactions in dogs and have negative impacts on their welfare.