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

Claim 9:
10. 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, is configured to emit a vibration sound in a Lobe mode as the first vibration sound, the Lobe mode being selected from a plurality of Lobe modes, and Lp≥2Mmax+1 is satisfied where Mmax is a maximum value of orders of the plurality of Lobe modes.