# US 2021/0241784 A1 · Sound inspection system and sound inspection method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241784 A1 - Document ID: US20210241784A1 - Status: Published application - Kind: A1 - Application number: 16/972,763 - Filed: 2019-03-01 - Published: 2021-08-05 - Earliest claimed: 2018-09-14 - Assignees: Hitachi, Ltd. - Applicants: Hitachi, Ltd. - Inventors: Reiso SASAKI; Takuma NISHIMURA; Takahiro YAMADA; Tsukasa FUJIMORI - Web page: https://patentgrep.com/patent/US20210241784A1 ## CPC - G10L 25/51: for comparison or discrimination - H04R 29/00: Monitoring arrangements; Testing arrangements {(for hearing aids H04R25/30; detection of loudspeaker connection H04R5/04; sound-field adaptation dependent on speaker detection H04S7/308)} - G01H 3/06: by electric means - G01H 17/00: Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass - G01M 5/0066: {by exciting or detecting vibration or acceleration (vibration testing of structures G01M7/00)} - G01M 99/00: Subject matter not provided for in other groups of this subclass - G05B 23/0221: {Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods} - G05B 23/024: {Quantitative history assessment, e.g. mathematical relationships between available data; Functions therefor; Principal component analysis [PCA]; Partial least square [PLS]; Statistical classifiers, e.g. Bayesian networks, linear regression or correlation analysis; Neural networks} - G08B 1/08: using electric transmission {; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal} - G08B 3/10: using electric transmission; using electromagnetic transmission - G10L 25/72: for transmitting results of analysis - H04R 1/08: Mouthpieces; {Microphones;} Attachments therefor - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - G01H 3/12: by electric means (G01H3/14 takes precedence) - H04R 2420/07: Applications of wireless loudspeakers or wireless microphones - H04R 2430/03: Synergistic effects of band splitting and sub-band processing - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - G01H: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract A sound inspection system that can reduce power consumption is provided. A sound inspection system 1 that determines a state based on a sound of an inspection target object 2 includes a sound sensor device 10 that collects the sound of the inspection target object 2, analyzes the collected sound, and transmits an analysis result, and a sound data determination device 30 that determines a state of the inspection target object based on the analysis result from the sound sensor device. The sound sensor device transmits, as the analysis result, intensities of the collected sound for each predetermined frequency set in advance. ## Claims ### Claim 1 A sound inspection system that determines a state based on a sound of an inspection target object, the sound inspection system comprising: a sound sensor device that collects the sound of the inspection target object, analyzes the collected sound, and transmits an analysis result; and a sound data determination device that determines a state of the inspection target object based on the analysis result from the sound sensor device, wherein the sound sensor device transmits, as the analysis result, intensities of the collected sound for each predetermined frequency set in advance. ### Claim 2 (depends on 1) The sound inspection system according to claim 1, wherein the sound sensor device determines whether or not the collected sound is classified into any onomatopoeia of predetermined onomatopoeias prepared in advance by analyzing the collected sound for the predetermined frequency, and transmits a classification result as the analysis result. ### Claim 3 (depends on 1) The sound inspection system according to claim 1, wherein the sound sensor device further includes an alert unit that outputs an alert according to an instruction from the sound data determination device. ### Claim 4 (depends on 1) The sound inspection system according to claim 1, wherein the sound sensor device is connected so as to be able to wirelessly communicate with the sound data determination device via a wireless master station. ### Claim 5 (depends on 1) The sound inspection system according to claim 1, wherein the sound sensor device is powered by a built-in battery. ### Claim 6 (depends on 1) The sound inspection system according to claim 1, wherein the sound sensor device further includes a power generation unit that converts the sound or a vibration of the inspection target object into power. ### Claim 7 A sound inspection method for determining a state based on a sound of an inspection target object, the sound inspection method comprising: transmitting, as an analysis result, intensities of collected sound for each predetermined frequency from a sound sensor device that collects the sound of the inspection target object to a sound data determination device; and determining, by the sound data determination device, a state of the inspection target object based on the analysis result received from the sound sensor device.