Abnormal sound specifying device, method of specifying abnormal sound, and non-transitory computer-readable storage medium storing computer-readable instructions for arithmetic device

Abstract

An abnormal sound specifying device (10) may include an arithmetic device (12) configured to access a learned model (52) of artificial intelligence and an output device (18). The arithmetic device may perform: specifying frequency-time data (54) of sound recorded at a vehicle (40); causing the learned model to specify a type of abnormal sound included in the sound based on the frequency-time data and causing the learnt model to specify a basis range (60,60a,60b) from the frequency-time data, the basis range indicating a frequency range and a time range that are used to specify the type of the abnormal sound; designating a designated range (64,64a,64b) indicating frequency and time ranges; and determining whether to cause the output device to output the type of the abnormal sound in a determination process, the determination process including, as a determination element, at least a determination on whether the basis range and the designated range overlap each other.