Opus Suite SLM 4-Ch Module User Guide – v2.5 2012-12-06 Compatible Hardware: Alto 6-Channel Concerto 4-Channel I-Track 6-Channel Soft dB Inc. 1040, Belvedere Avenue, Suite 215 Quebec (Quebec) Canada G1S 3G3 Toll free: 1-866-686-0993 (USA and Canada) E-mail: contact@softdb.
CONTENTS 1 Introduction ........................................................................................................................... 1 2 Compatible Hardware ............................................................................................................. 2 3 Opus Environment .................................................................................................................. 3 4 Quick Start........................................................................
7.2.6 Camera display................................................................................................................ 28 7.3 Data Selection ......................................................................................................................... 29 7.4 X Axis Properties ..................................................................................................................... 30 7.5 Y Axis Range ........................................................................
1 Introduction Congratulations on your purchase of the Opus Suite SLM 4-ch module. The Opus Software Suite is a Sound and Vibration software that contains several modules: • • • • SLM 4-ch module : 4-channels, Class 1 (IEC 61672 and ANSI S1.
2 Compatible Hardware Every hardware option has an embedded state of the art Soft dB SR-MK3 DSP board allowing realtime and precise measurement with very low energy consumption. Concerto 4-Channel Alto 6-Channel I-Track 6-Channel Handy, lightweight, fully rugged military grade (MIL-STD-810F and IP67) tablet PC with anti-glare & anti-scratch touch screen All in one instrument (no PC required) WLAN communication allows using the Concerto as a monitoring station with remote access. www.softdb.
3 Opus Environment The Concerto unit comes equipped with the Opus Environment. This environment acts as a main interface that gives access to the different modules and tools. Opus Suite V2.4a Modules The modules buttons will launch the associated module. When a module is opened, a license verification check is done. If no license is found for that module, a message will indicate the limitations. The File Manger button will launch the File Manager Utility (see section 10, p.
The Clock indicator displays the time and date on the unit. To change time, simply click on the indicator to display a dialog window. The Quit button will quit the application differently according to the hardware used. Concerto hardware: • Press and hold (5 sec) to shut down the unit. • Press and release to enter standby mode. Alto-6ch or I-Track hardware: • Press and hold (5 sec) to close the application and return to Windows.
4 Quick Start The AutoStore Setup is presumed to set to OFF. Step 1 Set the Averaging Time field to change the Leq Averaging Time. Click on the Step 2 Start the Measurement Click on the button to start a measurement. The measurement will be performed according to the current measurement setup. The measurement can be paused by clicking the button and can be resumed by clicking the button. Step 3 Stop the Measurement The measurement will stop at the end of the Leq Averaging Time.
Before Measurement During Measurement After Measurement ← Run / Pause / Continue Button ← Stop / Save Button ← Current DataSet ← Previous / Next DataSet ← Next DataSet To Be Saved1 ← Leq Averaging Time ← Running Time ← Current Leq Period Time ← Current Dataset Time ← Time from Start ← Over / Under Range Indicator ← Audio Recording Indicator ← Photo Information Indicator ← FTP Information Indicator 1 This indicator flashes red for 10 seconds when the measurement has stopped but has not been saved.
5 Main Interface The main interface is divided in five areas: 1) 2) 3) 4) 5) Measure controls (see section 5.1, p. 8) File Info (see section 5.2, p. 9) Measure Info (see section 5.3, p. 9) Menu bar (see section 5.4, p. 10) Display area (see section 5.5, p.
Input Setup Number of inputs(1 to 4) Input type (ICP or AC) Dynamic range Sensor sensitivity Display Setup Elements to display during the measurement Type of display (Time History, 1/3 octave Spectrum, FFT Spectrum, Numerical Indicator , Statistics or Camera) Record Setup Record destination (local drive and/or Web) DataSet ID management Data Selection to record Audio Setup Photo Setup AutoStore Setup Generator Setup The resulting configuration setup can be saved and recalled using File → Save Config a
5.2 File Info File Info This indicator displays the actual DataSet ID. These two buttons are used to open the previous/next DataSets in the Record Directory. This indicator displays the next DataSet to be saved. File Info Appearance – Auto-Store Off (see section 8.3, p. 39) During Measurement No Current DataSet ID is displayed during a measurement. The Next ID indicates the next DataSet to be saved.
Red background: Audio recording in progress on this input. Over/Under Range Transparent background: Input level is between the dynamic range limits. Blue background (low level): Input level is below the dynamic range lower limit. Red background (overload): Input level is above the dynamic range upper limit. Red outline (overload memory): Input level above the dynamic range upper limit during the active Leq average period. Photo Info: During the acquisition, it shows the number of photo events.
Launches the Record Setup (see section 8 ,p. 31) Comment / Tag Button Allows the user to write a comment on the measurement before it starts. When the measurement starts, this button becomes the Tag button. Tags events during a measurement. 5.5 Display Area One, two or four graph areas can be displayed in the Display Area. During a measurement, data is displayed in real-time. For each graph area, five types of display can be selected: • • • • • Time History Graph (see section 7.2.1 p.
5.5.2 Y Axis Scaling Each graph has a graph data. 5.5.3 icon at the bottom left corner. Clicking on this icon adjusts the Y scale to the Cursors A cursor can be used on each graph to help the user access an individual datum. However, the cursor on a historic graph is only available when the acquisition is stopped. Cursor Actions Get Cursor Click on graph to position the cursor. Cursor Value Cursor X value is displayed below the graph.
5.5.3.1 Complementary Actions Associated to the Cursors 1) The length of the Historic graph is limited to 1000 values. When the number of values excides 1000, the graph slides on the left so that only the most recent data is displayed. Moving the cursor on the left of the graph moves the time window back in time to display past values. 2) When the cursor on the Historic graph is moved, the values displayed in other graph areas will update to the current Historic cursor position.
3) 5.5.4 Selecting versus on a Spectrum graph displays either the Global value or the Band value (associated to the cursor) on the Legend. Listening to Audio Records When audio signals have been recorded during a measurement (see section 8.5 p. 45), a red line is displayed on the top of the Historic graph. The start position and length of the line corresponds to the recording period. To listen to the recording, the Historic graph must be magnified. Click on the corner of the graph to magnify the graph.
Recording Period 5.5.4.1 Selecting the record The Audio Recording Indicator is displayed on the top of the magnified Time History graph. In the case of simultaneous recordings on different channels, multiple red lines will be displayed on the Audio Recording Indicator. The top line represents channel 1 and the bottom line represents channel 4. Click on the red line of your choice at the desired position. The Record Cursor appears with a dot located on the chosen channel.
5.5.4.2 Click the Playing the record button at the right end of the Audio Recording Indicator to start playing the record. Adjust the volume with the control.
6 Input Setup Click the button on the main interface to launch the Input Setup interface. Input Selection Input Range Calibration Input Type Input Sensitivity FFT Spectrum Frequency Span 1/3 Octave Spectrum Frequency Span The Input Setup allows defining: • • • • • • Input Selection (see section 6.1, p. 18) Input Type (AC or ICP) (see section 6.2, p. 18) Input Dynamic Range (see section 6.3, p. 18) Input Sensitivity and Calibration (see section 6.4, p. 19) Input Reference Value (see section 6.5, p.
6.1 Input Selection The Concerto allows the user to perform measurements on 1 to 4 inputs simultaneously. Click on the / button to enable or disable specific inputs. The number of enabled inputs has an effect on the 1/3 Octave Spectrum Frequency Span: 1/3 Octave Spectrum Frequency Span Number of Enabled Inputs 6.3 Hz to 20 kHz 1 to 2 20 Hz to 20 kHz 3 to 4 6.2 Input Type The available input types are AC and ICP sensors. 6.3 Dynamic Range Dynamic range of each Input is around 94 dB.
6.4 Input Sensitivity and Calibration The input sensitivity can be manually changed in the text field or it can be calibrated using the calibration function and a sensor calibrator. Click the interface. 6.4.
6.5 Reference Value The reference value is the unit reference from which the decibel (dB) is calculated. 6.6 FFT High Pass Filter The FFT spectrum frequency bandwidth can be adjusted from a variety of choices: FFT Lines Frequency Resolution 20 kHz 854 23.4 Hz 10 kHz 854 11.7 Hz 5 kHz 854 5.85 Hz 3.33 kHz 854 3.90 Hz 2 kHz 854 2.34 Hz 1 kHz 854 1.17 Hz Bandwidth An electronic high-pass filter set at 0.9 Hz is applied on the input to block any DC.
7 Display Setup During a measurement, all acoustical parameters are calculated and available for display. button launches the Display Setup interface used to define: The • • • • • Graph number and disposition (see section 7.1, p. 21) Graph type (see section 7.2, p. 22) Data to display on each graph (see section 0, p. 29) Graph X axis properties (see section 0, p. 30) Graph Y axis range (see section 7.5, p. 30) Graph number and disposition Graph type 7.
7.2 Graph Type For each graph, the Graph Type list box allows the user to select the graph type. ← Time History Graph of global levels (see section7.2.1) ← 1/3 Octave Spectrum Graph (see section 7.2.2) ← FFT Spectrum Graph (see section 7.2.3) ← Numeric indicator of global levels (see section 7.2.4) ← Statistics Graph of SPL global levels (see section 7.2.5) ← Camera Display (see section 7.2.
7.2.1 Time History Graph Available data Data Type Global level 7.2.1.1 Measure Type SPL Slow SPL Fast SPL Impulse SPL Peak Leq SEL Display Type Instant, Max or Min Freq Weighting A, C or Z Running Average Particularities Length of the historic graph The Time History displays the last 1000 measured sample. All samples are available once the measurement has stopped. To display the past samples, drag the graph cursor so that it is positioned before the start of the graph (see section 5.5.3.1, p.
7.2.2 1/3 Octave Spectrum Graph Available data Measure Type SPL Slow SPL Fast SPL Impulse Leq SEL Data Type 1/3 Octave Spectrum level 7.2.2.1 Display Type Freq Weighting Instant, Max or Min A, C or Z Running Average Particularities Legend Values Selecting versus on a 1/3 Octave Band Spectrum graph displays either the Global value or the Band value (associated to the cursor) on the Legend (see section 5.5.3.1, p. 13).
7.2.3 FFT Spectrum Graph Available data Data Type FFT Spectrum level 7.2.3.1 Measure Type Leq SEL Display Type Freq Weighting Running Average A, C or Z Particularities Legend Values Selecting versus on a FFT Spectrum graph displays either the Global value or the Band value (associated to the cursor) on the Legend (see section 5.5.3.1, p. 13). FFT High Pass Filter A high pass filter is applied on the FFT spectrum to match the 1/3 Octave Spectrum frequency span, which is 6.
7.2.
7.2.5 Statistic Graph Available data Data Type Global level 7.2.5.1 Measure Type SPL Slow SPL Fast SPL Impulse SPL Peak Display Type Freq Weighting Max, Min and Statistics A, C or Z Particularities Graph / Data Display Selecting versus on a Statistic graph displays either the Cumulative Statistic Graph or a Table of most common Percentiles. Calculation Period The calculation period on which the statistics are computed is the same as the Leq Averaging Time (see section 5.3, p. 9).
7.2.6 Camera display The camera display can be used to display the life video captured by a webcam. The camera settings can be adjusted from the Photo Setup within the Record Setup interface (section 0, p.48). The software manages up to 4 cameras (acquires one at once). However, no more than one camera should be use on a Concerto unit to ensure realtime acquisition. Camera buttons Indicates that the camera is being displayed. Indicates that the picture is being taken and recorded.
7.3 Data Selection The Edit button of the Data Selection allows selecting the data to display on each graph. Display Element Click / to enable or disable the element. Each display zone can display up to four elements. Input Selection Select the Input Channel from which the data will be acquired. Only enabled inputs will be accessible (see section 6.1, p.18) Parameters Select the Parameter for each element. The selection may be restricted depending on the graph type (see section 7.2).
7.4 X Axis Properties The X axis range is automatically adjusted to the contained data. However, the 1/3 octave spectrum and FFT spectrum graphs X axis (frequency axis) range can be set manually to zoom in on a specific portion of the spectrum. For FFT spectrum specifically, the X axis (frequency axis) mapping can be set to linear or logarithmic. 7.
8 Record Setup The Record Setup allows the user to define: • • • • • • • Record Destination (see section 8.1, p. 32) Dataset ID (see section 8.2, p. 37) Auto-Store Setup (see section 8.3, p. 39) Data Selection (see section 8.4, p. 40) Audio Setup (see section 8.5, p. 45) Photo Setup (see section 8.6, p. 48) Generator Setup (see section 8.7, p.
8.1 Record Destination Obviously, the measurements can be saved on the local drive. These data are recorded in a format compatible for post-processing (either the Opus SLM-4ch module or the SLM Data Analyzer). A more advanced feature also allows saving the measurements on remote location on the Web. The data sent to the Web use a dedicated format for easier Web monitoring, but the data are also compatible with the SLM Data Analyzer. 8.1.
These DataSets are displayed as on the explorer window. The File/Open function in the main interface opens these DataSets to display them on the Main Interface. On the Opus SLM 4ch software, access to the DataSet content is prohibited to avoid suppression of any attached file. However, on a stand alone computer the access to the DataSet content is allowed to enable user to access the Data File and associated audio and photo files individually.
8.1.2 Record on the Web When Web + Local Drive is selected, the data are saved both locally (see above) and remotely. New controls appear on the panel to configure the Web transfer. This is an advanced mode intended for web monitoring. It is also possible to post-process the data sent on the Web (FTP server) with the post-processing software (SLM Data Analyzer). In this mode, the data are store locally for one full month before newer data replace older ones.
The combination of the Base Path, Unit Serial Number and Station Name form the record path on the FTP server. The Unit Serial Number is related to the hardware used. Therefore, it cannot be changed by the user. When recording to the Web, up to 4 different averaging periods can be enabled. The Main one is also the averaging period seen elsewhere in the module (Leq Average Time in the main panel of the module). Therefore, it can be seen as duplicated controls of the same parameter.
For example: • • 20120831_14h56m15_Per1_DS0.dat: DataSet started on 2012-08-31 at 14:46:15, averaging period 1 (the main one), the first DataSet of the measurement. 20120901_00h00m00_Per3_DS1.dat: DataSet started at the beginning of the day on 201209-01, averaging period 3 (the 3rd one), the second DataSet of the measurement. The measurement directory can contain the followings: • • • • 8.1.2.2 header.txt, contains the setup information of the measurement Data files (.
8.2 Dataset ID DataSet ID The ID Format allows the user to choose the name format of dataset files to be recorded. • • • • Four-digit increment of the DataSet in the Record Directory DataSet start time in format YYYYMMDD_hhmmss DataSet start time in format MMDD_hhmmss DataSet start time in format DD_hhmmss The ID increment allows the user to choose when to switch to a new measurement file. This control is enabled only when AutoStore is in Multiple Mode (see section 8.3, p. 39).
8.2.1 DataSet and Leq Alignment In several cases, it is useful to align the Leq measurements to match the time on the clock. For example, it may be useful to align the 1 hour Leq periods of a 24 hours acquisition (in Multiple AutoStore Mode) in order for the Leq to start exactly at the beginning of a new hour on the clock. A measurement started at 7:35 AM would then start a new Leq at 8:00 and every hour afterward.
8.3 Auto-Store Setup The Auto-Store Setup provides several options for saving measurements. AutoStore Modes The measurement will stop after the Leq Average Time elapses. The resulting DataSet must be stored manually by pressing the SAVE button. The measurement will stop after the Leq Average Time elapses. The resulting DataSet is stored automatically. The measurement continues after the Leq Average Time elapses, averaging is reset and each period data is stored automatically.
8.4 Data Selection The Data Selection area of the Record Setup Interface displays a summary of the options selected by the user. It also displays some relevant data size information. button launches the Record Data Selection interface that defines: The • • • Data Recording Mode (see section 8.4.1, p. 40) Data Record Rate (see section 8.4.2, p. 42) Values to Record (see section 8.4.3, p. 43) Sampling Rate Instantaneous / Average Record Mode Data Selection Options Data Selections 8.4.
8.4.1.1 Instantaneous Record Mode The Instantaneous Record Mode records instantaneous values at a rate defined by the Instant Rate. This record mode allows for more flexibility in post-processing, but creates much larger files. Use this record mode is recommended for taking short measurements that require high temporal resolution like impulsive events.
Global 1/3 Octave Spectrum FFT Spectrum SPL Slow SPL Fast SPL Impulse SPL Peak Leq and SEL SPL Slow SPL Fast SPL Impulse Leq and SEL Statistics A, C or Z Average Leq and SEL Statistics A, C and Z Average A, C and Z Average A, C and Z Note: Only Z weighting is recorded for spectrums as frequency weighting can be applied in postprocessing. Post-Processing Options The available operations for this record mode on post-processing are: • • • 8.4.2 8.4.2.
8.4.2.2 Average Record Mode In Average Record Mode, the record rate can be set between 1 s to 24 hrs. Simply click on the field to modify this value. This value can also be modified on the Leq Averaging Time indicator on the main interface (see section 5.3, p. 9). 8.4.3 Data Selections The Data Selection area includes four pages that display the data to record on each channel. The number of enabled pages corresponds on the number of enabled inputs (see section 6.1, p. 18).
Selected Data Channel Tabs The Statistic L% Selection control let the user decide what statistics data will be saved. This control applies to all statistic data (both global levels and 1/3 octave spectrums). 8.4.4 Data Selection Options The Data Selection Presets automatically selects the data to be recorded. The table below summarizes these options, as well as their advantages and drawbacks.
8.5 Audio Setup The audio recordings are useful to identify the source of the noise that was measured. Recordings can be done on a level trigger and/or periodically. Audio Format The file format of the audio recordings. • .mp3 file, 16-bit & 24 kHz sampling rate compressed to 32 kbps • .wav file, 16-bit, 24 kHz sampling rate (10 kHz usable bandwidth) • .wav file, 16-bit, 48 kHz sampling rate (20 kHz usable bandwidth) • .wav file, 32-bit, 24 kHz sampling rate (10 kHz usable bandwidth) • .
common audio players. Applying a gain exposes the audio signal to numerical saturations. Trig Tab The file format of the audio recordings. • • • • 8.5.1 OFF: No audio recording is performed. ON: Continuous audio recording is performed from the start to the end of a measurement. On Trig: Recording is triggered by a noise event and lasts the specified duration. On Multi-Trig: Recording is triggered by a noise event and the duration resets on every trigger value.
No audio recording is performed. OFF Continuous audio recording is performed from the start to the end of a measurement. ON Recording is triggered by a noise event and stops after the user-specified duration. On Trig On Multi-Trig Recording is triggered by a noise event and the duration is reset if the trigger value is exceeded before the duration has elapsed.
8.6 Photo Setup Along with the audio recordings, photos can be taken as an event occur or periodically. If activated, a camera will record a photo every time a new audio file is created. Virtually all webcams are compatible (use DirectShow interface). Press the Edit button to access the Photo Setup interface. 8.6.1 Photo Setup Interface Photo Setup Interface The Autofocus Delay should be adjusted to the time the camera takes to properly set its focus once it is powered.
8.6.2 Camera Setup Interface The Camera Setup interface is available from the Photo Setup interface. Camera Setup Interface The Camera Preview is the video streaming that outputs the camera. The Picture File Sample is a sample of the file that is recorded with the current camera setup. Select a camera from the Camera Selection menu. Select the image definition from the Image Mode menu. Adjust the Image File Quality from 0 to 100%. This quality factor is used in the jpeg compression process.
8.7 Generator Setup To edit the Generator Setup, press the corresponding button on the Record Setup interface. There are two independent generators that can be used. Output Channel Generator PC Sound Card Generator PC Sound Card Generator Output Channel Generator Uses the output channels 1 and 2 of the unit. Uses the sound card line out of the PC. Embedded generator with tone, white noise and Signal comes from a specified wave file. If DC offset (see section 8.7.2, p. 51).
8.7.1 Calibration Check The calibration check is generally used in long term or permanent environmental system. It is intended to periodically verify that a system is working properly and that the acquisition level is adequate. To achieve this goal, an actuator has to be installed near the input sensor. Prior the measurement, the actuator will be exited to provide a reference signal at the input and the obtained reference spectrum will be saved.
Averaging Controls Starts and stops the average of the averaging of the spectrum. Once the Average Time in completed, the user is asked if the current spectrum should be used as the reference. Resets the averaging of the spectrum. The elapsed time since the beginning of the averaging. The duration of the averaging. Current spectrum on inputs Spectrum Graph The FFT spectrum of the enabled inputs. The legend of the plots and the global levels of are displayed in the upper right corner.
9 Data Exporter The Data Exporter utility is used to export data contained in a dataset in a .txt or .
Directory Path File/Folder Operators Transfer Operator Export File Content Displays the path of the active directory. Can be used to: • • • Go to parent directory Open directory Rename folder or file Transfers the Dataset content to the output data file. Displays the content of the output file. To add data, drag DataSets from the Directory Content to the Output File Content or click on the Transfer Operator to transfer selected DataSets. Allows easy access to common directories.
10 Explorer Dialog File / Folder Operators Directory Path Shortcuts Directory Content Explorer Window Controls and Indicators File/Folder Operators Directory Path Shortcuts • • • • • Displays the path of the active directory. Accesses to common directories.
11 File Manager The File manager is used to perform most file operations: • • • • • Navigate the directory structure Create folders Rename files and folders Move or copy files and folders from one place to another Delete a file or a folder Although not very useful on a stand-alone computer, this manager is necessary on the Concerto, on which Windows explorer is unavailable.
Directory Path Displays the path of the active directory. Shortcuts • Desktop • My Documents • Computer When the File Manager is used on a Concerto, the shortcuts are linked to: Allows easy access to common directories. When the File Manager is used on a stand-alone computer, these shortcuts are linked to: • • Move/Copy Operators File/Folder Operators Directory Content Disk info Opus Root USB Device. Copies or moves a file or folder from a source to its destination.
Appendix 1: Concerto Hardware Connections Mic Stand 4 Inputs Loudspeaker Headphone Jack Power-on button 2 Outputs DC in ¼ 20 insert Second Battery USB port Battery indicator Right click 58 Enter Arrow keys
Power on/off Power-on Turn On Turn Off Press the trigger button located at the back of the unit This key has two (2) functions: 1. To turn the unit ON. 2. Start a measurement once the SLM Module is loaded After a few seconds, the Opus Environment Interface will appear. The stand-by mode allows fast load time. Stand-by • To put the unit on stand-by, click the Turn Off button.
Power Reset If the Concerto happens to crash and it is not possible to take back the control, a power reset might be necessary. To complete the power reset, the three buttons on the front of the Concerto must be used. Here is the procedure: Step 1 Press and hold the Function, Enter and Down Arrow button for 5 seconds until the Concerto shuts down Step 2 Wait 5 seconds and press the power button Step 3 Wait 5 seconds and press the power button a second time to restart the Concerto from a power reset.
Inputs and Signal Processing Specifications (Embedded Signal Ranger MK3 DSP Board) Texas Instruments TMS320C6424 DSP Processor 4 Inputs 2 Outputs 2 x (25-120 dBA or 30-130 dBA) + 2 x (25-120 dBA) Linear Range AC, DC, ICP (4 mA) Conditioning Physical (DAP Tech 9000 Tablet PC) Intel Atom E660T 1.3 GHz Operating system Storage Data Transfer 16 GB SSD USB Display 180 mm (7 inches) WVGA (800 x 480) Dimensions 230 x 185 x 60mm (9.0 x 7.3 x 2.
Appendix 2: 1/3 Octave Filters – IEC 61260 Class 1/ANSI S1.11 1/3 Octave Filters The 1/3 octave filters are computed at low-level in real time (at 48 kHz) on the digital signal processor (DSP) of the Concerto system. The filters comply with all requirements of IEC 61260 for Class 1. Frequency Range 20 Hz to 20 kHz. Filter Shape The following curve presents the filter shape test done for the 1000 Hz 1/3 octave band. The red and green curves represent the limits associated with the IEC standard (Class 1).
Shape Test Numerical Results at 1 kHz The following table presents the numerical results of the shape test at 1 kHz: Frequency (Hz) Low limit (dB) Measurement (dB) High limit (dB) 185.5 -inf -96.0 -75.0 327.5 -inf -85.1 -62.0 531.4 -inf -61.1 -42.5 772.6 -inf -28.2 -18.0 891.3 -4.5 -3.0 -2.3 919.6 -1.1 -0.3 0.15 947.0 -0.4 0.0 0.15 974.0 -0.2 0.0 0.15 1000.0 -0.15 0.0 0.15 1026.7 -0.2 0.0 0.15 1055.8 -0.4 0.0 0.15 1087.5 -1.1 -0.3 0.15 1122.0 -4.5 -3.
1/3 Octave Filter Linearity The linearity of the 1/3-octave filter has been measured for both ranges (low and high). The experimentation is done with an adaptor (ADP092) and an electric signal. The results in dB are for an input sensitivity of 50 mV/Pa. The maximum and the minimum linear levels are measured for each 1/3 octave band along with the noise floor. Filter Linearity (Low Range) Saturation Level Frequency (Hz) (dB) 120.5 20 Minimum Linear Level (dB) 39.5 Linear Dynamic Range (dB) 81.
Minimum Linear Level (dB) 26.3 Linear Dynamic Range (dB) 94.2 Noise Floor (dB) 10000 Saturation Level (dB) 120.5 12500 120.5 27.0 93.5 17.5 16000 120.5 27.6 92.9 19.5 20000 120.5 28.3 92.2 19.7 Minimum Linear Level (dB) 51.5 Linear Dynamic Range (dB) 81.0 Noise Floor (dB) Frequency (Hz) Filter Linearity (High Range) Saturation Level Frequency (Hz) (dB) 132.5 20 16.9 7.3 25 132.5 49.2 83.3 5.3 31.5 132.5 47.1 85.4 2.0 40 132.5 44.2 88.3 7.9 50 132.5 41.8 90.7 9.
Minimum Linear Level (dB) 32.7 Linear Dynamic Range (dB) 99.8 Noise Floor (dB) 8000 Saturation Level (dB) 132.5 10000 132.5 33.5 99.0 23.5 12500 132.5 34.1 98.4 25.2 16000 132.5 35.8 96.7 27.3 20000 132.5 37.1 95.4 27.7 Frequency (Hz) 22.4 1/3 Octave Filter Summation For this test, sine waves from 20 Hz to 20 kHz are measured with the Concerto system. For each sine wave the summation of the 1/3 octave filters is computed to form the following curves.
Summation Test (High Range Case) 0.5 0.4 0.3 Amplitude dB 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.