Soft dB Mezzo I-Track Manual de usuario

Mezzo I-Track System Kit

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@softdb.com

Contents

1Introduction.................................................................................................................................1

2Specifications...............................................................................................................................2

3Setting Up the Tracking Pad ......................................................................................................3

4Setting Up the Digital Camera ...................................................................................................5

5Setting Up the Mezzo I-Track Module.......................................................................................6

5.1 Setting Up Input..................................................................................................................................... 6

5.1.1 Retrieving Microphone Set Information from Mezzo Sound Intensity Probe.........6

5.1.2 Calibrating each microphone...............................................................................................7

5.1.3 Selecting the Microphone Spacer.....................................................................................10

5.2 Selecting Data Type ............................................................................................................................11

5.3 Selecting the Record Directory........................................................................................................12

5.4 Setting Up Probe Tracking and Background Picture.................................................................13

5.4.1 Taking a Background Picture..............................................................................................13

5.4.2 Testing Probe Tracking ........................................................................................................15

5.4.3 Defining a Custom Measurement Surface......................................................................16

6Performing a Quick Field Check.............................................................................................. 18

7Performing a Measurement .................................................................................................... 19

7.1 Method of Measurement...................................................................................................................19

7.2Step-by-Step Operation.....................................................................................................................20

8Analyzing Data ......................................................................................................................... 23

8.1 Theory.....................................................................................................................................................23

8.1.1 Sound Intensity vs Sound Pressure...................................................................................23

8.1.2 PI index.....................................................................................................................................24

8.1.3 Advanced Indicators.............................................................................................................25

Extraneous Sources.................................................................................................................25

P|I| index....................................................................................................................................25

Sound Power............................................................................................................................25

8.2 Using the Mezzo I-Track Module to Analyze Data ......................................................................26

8.2.1 Exact vs Approximate Levels..............................................................................................26

8.2.2 Changing the Sound Image Frequency Band................................................................27

8.2.3 Changing Data Type.............................................................................................................28

8.2.4 Formatting the Sound Image.............................................................................................30

Changing the Color Scale......................................................................................................30

Layering more Information...................................................................................................30

Changing the Geometric View..............................................................................................32

8.2.5 Adding Bounds ......................................................................................................................33

8.2.6 Viewing the 3D Scene ..........................................................................................................34

8.2.7 Advanced Parameters..........................................................................................................35

Averaging Radius....................................................................................................................35

Maximum Interpolation Distance .......................................................................................35

Maximum Distance and Angle to Plane.............................................................................35

9Exporting Data.......................................................................................................................... 36

9.1 Exporting a single sound image......................................................................................................36

9.2 Exporting average data......................................................................................................................36

9.3Exporting all sound images and average data ............................................................................36

10 Viewing Measurement Info..................................................................................................... 37

1Introduction

Congratulations on your purchase of the Mezzo I-Track system kit. This kit along with the Mezzo

Sound Intensity Probe provides an innovative and cost-effective solution for sound intensity

imagery. More than just an imaging system, the I-Track system provides a very accurate sound

power measurement system.

The current user’s manual describes the Mezzo I-Track kit and software. For more information on

the Mezzo Sound Intensity Probe, refer to the Mezzo Sound Intensity Probe with Mezzo Intensity

Analyzer module user guide.

2Specifications

Included Accessories

Component Description

Digital Camera 1600x1200, USB 2.0, CMOS Color Digital Camera, Optically Corrected wide-angle lens

Manual Iris and Focus, FOV 120° (Wide mode), 82° (Zoom mode)

Tracking Pad 170x170 mm, acoustically transparent

Tracking Pad

Holder Plastic L-shaped tracking pad holder, 85x63mm

USB Cable 3 m USB 2.0 cable with Mini B connector

Case Plastic transport case, 450x395x115mm (17.75x15.5x4.5”)

Module Specifications

Specifications

Spectrums 1/1 Octave , 1/3 Octave, 1/24 Octave, or FFT

(user defined bandwidth to fit microphone spacer, from10Hz to 20kHz)

Frequency Weightings A, C and Z

Metrics (Spectrum and Global levels)

Pressure, Intensity, PI index (F3), P|I| index (F2),

Extraneous Sources index (F3-F2), Sound Power

Instant Rate Variable from 50ms to 1s

Phase Mismatch Compensation FIR-IIR phase correction filters

Environmental Compensation Compensation for Atmospheric Pressure, Temperature and Humidity

Tracking Optical Tracking using digital camera, 6 Degrees of freedom (DOF),

Real-World units

Camera Resolution 800 x 600

Measurement Plane 6 DOF Position and Area automatically computed using 3D data points

Interpolation Constrained Delaunay Triangulation

Averaging 2D Gaussian averaging (user defined size from 0 to 1m radius)

Standard Compliance IEC 61043 (1993)

Computer Requirements

Item Minimum Requirements

Operating System Windows XP SP3, Windows Vista, Windows 7, Windows 8

CPU Dual-Core at 2.4 GHz

Memory 2 GB RAM

Hard drive 300 MB free hard disk space

Port USB 2.0

Display resolution 800 x 600

3Setting Up the Tracking Pad

1) Install the tracking pad holder onto the Mezzo Sound Intensity Probe;

2) Make sure the holder is close fitted to the handle body;

3) Take the tracking pad and place it face down on a table. Make sure the table is clean to

avoid staining the fabric;

4) Fasten the tracking pad to the holder using the two thumb screws;

5) Adjust the position of microphone 2, it should be 85mm from the table and the probe

reference axis should be perpendicular to the table surface;

4Setting Up the Digital Camera

1) Install the digital camera on a tripod and position it towards the device under test

2) Connect the camera using the USB cable

3) Locate the control rings for Iris and Focus, they will be useful during tracking setup (refer to

section 5.4, Setting Up Probe Tracking and Background Picture, p.13);

* Tripod not included

5Setting Up the Mezzo I-Track Module

5.1 Setting Up Input

Click on the button from the “Setup” tab to enter the input setup:

5.1.1 Retrieving Microphone Set Information from Mezzo Sound Intensity Probe

Click on the “Mic Set” button:

Click on the “Load Info From Mezzo” to load the calibration information from the Mezzo Sound

Intensity Probe:

5.1.2 Calibrating each microphone

Click on the “Calibrate Mic A” button:

Enter the calibrator level and frequency.

Insert the microphone in the calibrator:

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