It’s well established that sudden loud noises, such as fireworks or thunderstorms, commonly trigger a dog’s anxiety, a new study finds even common noises, such as a vacuum or microwave, can be a trigger. The research found that high-frequency, intermittent noises such as the battery warning of a smoke detector are more likely to cause a dog anxiety, rather than low-frequency, continuous noise. Because dogs have a wider range of hearing, some noises could also be potentially painful to a dog’s ears, such as very loud or high-frequency sounds. We can change batteries more frequently in smoke detectors or remove a dog from a room where loud noises might occur.

According to the study, noises ___.

A) make dogs happier

B) with high-frequency and intermittence make dogs uneasier

C) with low-frequency and continuousness make dogs more anxious

D) will not be heard by dogs