UMS Software

Precision Acoustics UMS software is written in LabVIEW and meets the requirements of the latest IEC standard 62127-1 and NEMA UD-2 or measurement requirements of FDA 510(k) submission It is regularly updated, as regulations change, and our staff can customise it for customers’ specific applications. Customisation may be provided free during the first 4 months and at cost thereafter.

The UMS Software

integrates with the XYZ Scanning Gantry and a modern oscilloscope.

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