Patent ID: 11959883
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A diagnostic apparatus comprising:
a sound-emitting unit including a plurality of speakers arranged at equal angular intervals on a circumference of a circle, the sound-emitting unit being configured to emit a first vibration sound to a target by using the speakers;
at least one measurement unit arranged on a central axis of the circle, the at least one measurement unit being configured to measure a vibration of the target generated in response to the first vibration sound, or a second vibration sound radiated from the target due to the vibration; and
a processor configured to diagnose the target based on an output from the at least one measurement unit,
wherein the sound-emitting unit includes Lp speakers as the speakers, and is configured to emit a vibration sound in a Lobe mode as the first vibration sound, Lp≥2M+1 is satisfied where M (M≥1) is an order of the Lobe mode, and a phase difference depending on Lp and M is set between two speakers adjacent to each other on the circumference.