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PRO-515: Acoustic Absorption
Getting characteristics of Porous Materials
NetdB-PRO-515: Kundt Method for porous materials!
A complete system for getting the absorption characteristics of porous materials, using the Kundt method complying with ISO-10534 and ASTME E-1050 standards.
The PRO-515 system is composed of:
- 2 Kundt tubes of different sizes both holding a wideband acoustic plane wave source
- ¼'' microphones and adjustable samples holder
- Internal (Symphonie) or external noise generator
- 2-way wideband power amplifier/booster
Together with a Windows-based dedicated software, PRO-515 allows easy and reliable measurement of the acoustic absorption "∧" coefficient of porous materials
Key Features
Standard compliant and Expandable
- 2 Kundt tubes of different diameter sizes (28mm and 100mm respectively) according to ISO1053 and ASTM E-1050
- Samples length up to more than 40 cm
- Improve precision by using 2 independent tubes and heavy Alu-based tubes construction
- Kundt tubes pair upgradeable for TL measurement
- Alternative methodology available for poro-acoustic materials characteristics based on Impulse response technique
Easy to operate and flexible
- User friendly software interface leading up to completion of the measurement
- Typical application for Laboratory use
- Also portable and battery operable
- Easy calibration in amplitude and phase for microphone pairs
Options
- Upgrade to PRO-516 for TL measurements from TF method
- Upgrade to PRO-517 for increased accuracy in parameters determination using on Impulse Response for: Alpha and Zc complex (energy based method)
Applications
Applicable to Porous, Multi-layers, Sandwich materials in: Automotive, Aeronautics, Railway, Ship, Construction Machines, Building construction.
PRO-515 Technical Specifications
Signal input
- Input impedance: 1 Megohms
- Input connection: DC o AC (da 0,3 o 10 Hz +/ - 10 %); LEMO 7 pin
- Signal conditioning: Microphone Preamplifier (28V-10mA), Polarization Voltage (0-200 V), IEPE* (4.3 mA), Direct Input
- Tacho input: Auxiliary Input
- Max voltage input: 20 V p-p, Overload protection
- Channels: < 0.1° with same gain on both channes, < 0.5° if different gain
- Phase Filtering: HiPass filter (0.3/10 Hz)
A/D Convertor
- Resolution: 18 bits sigma/delta.
- Sampling: 51.2 kHz max.
- Antialiasing: Butterworth, 120dB/octave
- Offset: Automatic
- Signal/Noise ratio: > 90dB
- Amplifiers: up to 65 dB in 1 dB step600MHz
Analog Output
- Type: 1-2 channels output syncronized with acquisition
- Sampling: From 100 Hz to 51.2 kHz
- Connection: LEMO 4 pin
- Converters: 18 bits
- Max Voltage output: 5 V p-p
Dimensions
- Dimensions: 85 x 35 x 220 mm
- Weight: 500 gr
Digital I/O
- Connections: 2 inputs and 2 ouputs
- Processors: TMS320C31 + TMS320C203
- Performance: 100 MFLOPS
- Precision: 32 Bits
- SRAM: 128K x 32 bits
- RAM: 16Kb double access
- Connector: Mini Dyn (PS/2 )
Power supply
- Power supply type: PC powered PCMCIA card
Microphone Cartridge
- Type: ¼'' Pressure
- Sensitivity: 4mV/Pa
- Freq. Range (±1dB): 10Hz - 40kHz
- Polarisation voltage: 200V
- Capacitance: 7pF
- Calibration certificate : included
Plane Wave Loudspeakers
- Rated Power: 50W
- Coil Impedance: 4 ohm
- Freq. Range (±3dB): 100Hz - 15kHz
- Resonant Freq.: 70Hz
- Source Diameter: 130mm
Noise Generator
- Noise spectrum: White - Pink
- Crest Factor: >3.3
- Bandwidth: 10Hz - 40kHz
- Output Level: 0dB (re 1Vrms); -10dB; -20dB
- Output Impedance: 50 ohm
Power Booster
- Rated Power (2x4 ohm load): 2x22W
- Freq. Range: 1Hz - 150kHz
- Total Harmonic Distortion: <0.1%
- Hi-pass Filter: 31.6Hz - 100Hz
- Lo-pass Filter: 5kHz - 20kHz
Mechanical Elements
- Frequency Response:
(28mm Tube): 450Hz - 7100Hz
(100mm Tube): 50Hz - 1800Hz - No-Sample Absorption (Tube 28 / 100 mm): <2% / <3%
- Source - Sample Distance (Tube 28 / 100 mm): 165 / 550 mm
- Sample Length (Tube 28 / 100 mm): up to 250mm
- Device Weight (28 / 100): approx. 6 / 17 kg
- Height x Depth (both devices): 260 x 250 mm
- Length (no sample) (28 / 100): 700 / 1165 mm
Software
- Platform: MS Windows '98 / 2000 / XP
- Graphical User Interface: Simple 2 level menu
- Kundt Device Calibration: Message driven
- Freq. Sub-Ranges: User selectable
- Frequency Sub-Ranges Linking: Available
- Acquisition parameters: User selectable
- Absorption coefficient "alpha":Automatically computed
- Graphical Data Rendering: FFT or 1/3 octave
- Multiple Data Superimposing: Available
- Database Type: Native, user selectable
- Data Export Format: text file
- Report Printout: Standard available
Microphone Preamplifier
- Size: ¼''
- Freq. Range: 2Hz - 200kHz
- Noise (Lin): <6µVRMS
- Body Length: 43mm
- Cable length: 2m
- Connector: Lemo 7 pin male
* IEPE: Integrated PiezoElectric Electronic
Ordering Information:
SSP3002000: Symphonie 2 channel inputs Lemo 7 - 2 channel outputs - PCCARD Interface
G-40BP: ¼'' Pressure Microphone
G-26AC: ¼'' Microphone Preamplifier with Integral Cable 2m
M-V11: Power Booster with HP - LP Filters
M-G10: Noise Generator
M-AR42OK: 12V DC System Power Supply / Four Module Holder
ALIM-AT3: 220V AC/12V DC 3A Main Adapter
SS000/1-SET: High Quality BNC Interconnection Cable Set (3x1m)
dBAlphatest: Software Package for alfa coefficient (Win98 / 2000 / XP)
SCS9020B: 2 Kundt Tubes sizes f28x165mm and f100x600mm), 2 Adjustable Sample Holders sizes f28x250mm and f100x90mm
Para mais informações, nós contatar : comercial@01db.com.br
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