Precision Acoustics UMS softwareis written in LabView 8.6 and meets the requirements of the latest IEC standard 62127-1 and NEMA UD-3 or measurment requirements of FDA 510(k) Track 111 submission It is regularly updated, as regulations change, and our staff can customise it for customers’ specific applications. Customisation will be provided free during the first 4 months and at cost thereafter.
The UMS software
integrates with the XYZ Scanning Gantry and the supplied Lecroy Wave Runner 62Xi or other oscilloscopes as specified by customer
- automatically aligns the hydrophone to the beam maximum
- includes software routines to ensure hydrophone is stationary before waveform is acquired
- can automatically conduct linear or planar scans in any combination of directions e.g.transaxial (x,z or y,z) and transverse (x,y) and the system is not restricted to any primary axis
- outputs data in “.txt” (ASCII) format for easy integration with other software packages.
- automatically computes standard acoustic parameters, including full waveform deconvolution.
- Additional software will be included to automate the control of a customer specified function generator to enable frequency scans
UMS Software Acoustic Parameters has been used to make FDA 510(k) submissions. It calculates the following acoustic parameters at a single hydrophone position. This requires that a calibrated hydrophone is used and we would recommend a NPL calibrated membrane hydrophone for this purpose. (A suitable hydrophone is available from Precision Acoustics at extra cost.) All calculations are carried out according to the relevant international standards.
| Acoustic Parameter | Description |
| Pr | Peak rarefactional pressure |
| Pc | Peak compressional pressure |
| Pr.3 | Derated peak rarefactional pressure |
| Pc.3 | Derated peak compressional pressure |
| Isppa | Spatial-peak pulse-average intensity |
| Isppa.3 | Derated spatial-peak pulse-average intensity |
| MI | Mechanical index |
| AWF | Acoustic working frequency |
| Depth | Distance to start of pulse |
| PD | Pulse duration |
| PII | Pulse-instensity integral |
| PII.3 | Derated pulse-instensity integral |
Other acoustic parameters can be derived from the above, including (but not restricted to) the following
| Acoustic parameter | Description |
| Iob | Power divided by beam width measured from planar or orthigonal cross scan |
| Focal volume | Combination of beam widths from transverse and axial scans |
| Ispta (spatial-peak temporal-average intensity) | For a single element transducer,PII divided by pulse repetition interval |
| ERA (effective radiating area) | The area close to the transducer through which most of the acoustic power passes |
| BNR (Beam non-uniformity ratio) | The ratio of the spatial-peak temporal-average intensity to the spatial-average intensity, averaged over the effective radiating area. |
