hearing dog

noun

1. a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.

noun

1. a dog that has been specially trained to help deaf or partially deaf people by alerting them to sounds such as a ringing doorbell, an alarm, etc

n.

1. A dog trained to assist a deaf or hearing-impaired person by signaling the occurrence of certain sounds, such as a ringing telephone.