SoftdB Mezzo Sound Intensity Probe User Manual Download Page 3

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Introduction

Congratulations on your purchase of the Mezzo Sound Intensity Probe. This instrument provides an

innovative and cost-effective solution for sound intensity measurements. More than just a DAQ

system, the DSP embedded in each MEZZO Intensity Probe ensures real-time signal processing.

Designed to be used with a tablet PC or any other Windows-based PC, the MEZZO Intensity Probe

benefits from the versatility and flexibility provided by computers. This approach allows the

MEZZO Intensity Probe along with the MEZZO Intensity Analyzer Module to be offered at a very

competitive price.

The current user’s manual describes the Mezzo Sound Intensity Probe hardware and its use

through the Mezzo Intensity Analyzer module.

Summary of Contents for Mezzo Sound Intensity Probe

Page 1: ...Intensity Probe with Mezzo Intensity Analyzer Module User Guide 2022 02 17 Soft dB Inc 1040 Belvedere Avenue Suite 215 Quebec Quebec Canada G1S 3G3 Toll free 1 866 686 0993 USA and Canada E mail info...

Page 2: ...ty Probe 6 4 1 2 Calibrating each microphone 7 4 1 3 Selecting the Microphone Spacer 10 4 2 Selecting Data Type 11 4 3 Selecting the record directory 12 5 Performing a quick field check 13 6 Performin...

Page 3: ...ures real time signal processing Designed to be used with a tablet PC or any other Windows based PC the MEZZO Intensity Probe benefits from the versatility and flexibility provided by computers This a...

Page 4: ...mum Sampling Rate 48 kHz Signal Conditioning IEPE Communication USB 2 0 Mini B connector Dimensions 370 x 32 x 23 mm Power Supply USB Powered Max 0 35W Included Accessories Component Description Inten...

Page 5: ...aved at the end of the measurement Display All measured data both live and overall can be displayed during the acquisition Only the overall data can be viewed once the acquisition is completed Miscell...

Page 6: ...ble the microphone 2 by using the straight preamplifier adapter 5 Insert the microphone 2 in the microphone holder 6 Connect the microphone 2 to the cable labeled 2 7 Select the appropriate microphone...

Page 7: ...5 3 2 Installing the windscreen It is recommended to use the windscreen on the probe to limit effect of wind noise and also to protect the probe...

Page 8: ...k on the button from the Setup tab to enter the input setup 4 1 1 Retrieving Microphone Set Information from Mezzo Sound Intensity Probe Click on the Mic Set button Click on the Load Info From Mezzo t...

Page 9: ...7 4 1 2 Calibrating each microphone Click on the Calibrate Mic A button Enter the calibrator level and frequency Insert the microphone in the calibrator...

Page 10: ...8 Turn ON the calibrator and click on Run Click on Stop when level is stable...

Page 11: ...by clicking Check instead of Run This allows to measure the calibration level without changing the sensitivity It is recommended to check the calibration after each measurement campaign to validate th...

Page 12: ...iated bandwidth relative to the degree of precision Laboratory Expertise Control Probe Intensity Response H F Limit 1 dB 2 dB 3 dB Pressure Residual Intensity Index L F limit 15 dB 12 dB 9 dB 12 5 mm...

Page 13: ...the available bandwidth is affected by the microphone spacer bandwidth Refer to section 4 1 3 Selecting the Microphone Spacer p 10 for more information The instant rate is the live data rate This rate...

Page 14: ...ave button once the measurement has ended whereas the automatic mode records the file automatically at the end of the measurement Browse to the desired record directory The recorded files will have a...

Page 15: ...sitive intensity Locate the sound intensity away from the sound source and check the compass indicator Be sure to locate the sound probe at the same point You can use a tripod or a similar object as a...

Page 16: ...e scanning path must be uniformly distributed on the measurement surface and it must be followed with the probe at a constant speed For more information on how to select an appropriate path refer to I...

Page 17: ...ath 11 Back to the main interface click the button on the interface or press the button on the probe to start the measurement 12 As soon as the measurement is started move the probe at constant speed...

Page 18: ...of sound energy flow through a surface Thus the normal energy flow will equal the full magnitude of the sound intensity vector when the vector is in line with the reference axis It will be positive w...

Page 19: ...e axis It will be 72 dB when the direction of propagation is 60 with respect to the reference axis and inf dB when it s 90 7 1 2 PI index In practice the sound field is not perfectly perpendicular to...

Page 20: ...gnificantly from negative to positive during the measurement This is a strong sign of reactive field P I index This index is called F2 or Surface Pressure Intensity indicator in ISO 9614 1 It represen...

Page 21: ...See section 4 2 Selecting Data Type p 11 The buttons allow to view the basic data which are Sound Intensity Level Sound Pressure Level and PI index When displaying sound intensity levels the red bars...

Page 22: ...zer to a tab delimited file to import in Excel 9 Viewing Measurement info A measurement file contains all the setup information It s also possible to add a comment to a measurement file to document th...