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■ 8607 Sound Holographoraf NEAR-FIELD ACOUSTIC HOLOGRAPHY (NAH) builds a mathematical model that expresses the sound field based on a set of sound pressure data measured in a very close plane to the sound source. With this model, you can calculate sound field parameters such as sound pressure, sound intensity, and particle speed in the target plane parallel to the measured plane. Using this model, you can calculate the response of the long -distance field, and in that case, the sound pressure distribution in long -distance sites is estimated based on the Helmholtz integration equation (HIE). Further noise reduced schemes can be applied to evaluate the effects of various source reductions. Calculation algorithms are statistical optimization near-range area range field sound holography (Statistically Optimied Near-Field Acoustical Holography, SONAH) and equivalent sound source laws (Equivalent Source Method, ESM). You can use two. SONAH's calculation method allows you to overcome the following restrictions that could not be avoided with conventional NAH calculation. ・ In order to avoid the impact of spatial windows, the measurement surface must be covered by areas larger than the entire noise source. ・ The measurement grid must be a rectangle / square of equal intervals to perform space FFT calculation. SONAH can use irregular arrangements, and even if it is a small array than the measured target sound source, it can be measured without greatly affected by the spatial window. The equivalent sound source law (ESM) is suitable for large unevenness on the sound source surface. You can remove the adverse effects that aren't flat on SONAH. Therefore, when applying a panel contribution analysis, intensity component analysis, and on -site sound absorbing measurement, use ESM. ■ Measurement and analysis The standard NAH measurement is performed by scanning the sound source using a finite size grid array and positioning system robot. The reference signal is also measured at the same time to maintain the absolute phase relationship between the scanning position. When measuring transient sounds, usually use a large array and use it to measure all measurements at the same time.
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Calculated shape type
Calculation display axis
Calculation filter
Calculation function
Calculation method
Calculation multi -core support
Calculation reference signal
Calculation sound source behavior
Change of data processing information
Confirmation of data processing information
Contribution analysis sound power calculation
Data processing database
Imaging image
Measurement data
Measurement monitor
Measurement processing
Measuring automatic processing
Number of sound source map display
Reporting Microsoft® Word report creation
Reporting cut & paste
Reporting video file generation
Search for data processing information
Sound source map display display alignment
Sound source map display playback
User interface
User interface default
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8607Handling Company
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| Image | Price (excluding tax) | Calculated shape type | Calculation display axis | Calculation filter | Calculation function | Calculation method | Calculation multi -core support | Calculation reference signal | Calculation sound source behavior | Change of data processing information | Confirmation of data processing information | Contribution analysis sound power calculation | Data processing database | Imaging image | Measurement data | Measurement monitor | Measurement processing | Measuring automatic processing | Number of sound source map display | Reporting Microsoft® Word report creation | Reporting cut & paste | Reporting video file generation | Search for data processing information | Sound source map display display alignment | Sound source map display playback | User interface | User interface default |
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Available upon quote | Plane, confominial | Time, RPM, angle | Frequency, next number | Sound pressure, sound intensity, reactive intensity, particle speed, front sound source intensity, backward sound source intensity, scattering intensity, radiant intensity, tone absorption | Nah, SONAH, ESM | Possible | Real signal/virtual signal | Standing, standard, unlimited | Possible | Possible | Area, component | At the same time | Unavoidable | Time/spectrum | Possible | Singles, patches, scans | Automatic storage, automatic calculation, selection calculation | 1x1-4x4 | Each frequency, each index | 1 Display, full display | Animation standards, audio standards | Possible | Camera position, data, frequency, index, color scale | Calculation point | Basic, advanced, user definition | User definition |
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