Noise Vision
Sound and Vibration
Noise Vision
The omnidirectional system analysis sources from NAE – Nittobo Acoustic Engineering – Tokyo – Japan
This system consists of a spherical transducer equipped with 31 microphones and 12 cameras, and allows you to get, as a result of a rapid and simple acquisition, the noise map in any direction with respect to ball-transducer. The representation of noise maps can be both static form for the analysis of phenomena stationary, both in form ‘animated’ for the analysis of the phenomena of non-stationary or moving source.
The rapid identification of different sources within a complex machinery that help with the total noise emitted by a machine, as well as the search for sources within a workplace, has always been a problem primary importance, which for its solution requires usually lengthy and complex acoustic measurements. With Noise Vision is possible to obtain the same results (and more) in a form of immediate interpretation and execution time of measurement and processing of extremely modest.
Among the applications NoiseVision outstanding
- Research generic sources
- Study dynamic noise emitted from a source
- Analysis advanced noise inside the car
- Identification of sources within the workplace
- Classification of acoustic insulation systems
Specifications
- Microphones: 32 ICP
- Front-End noise: TEAC LX-20
- Front-End Video: Nittobo
- Operating Frequency Range: 200Hz ~ 5.000 Hz
- Option dynamic analysis
- Option automated analysis report in ppt format
- 12V Power Option
Components of the system
- Spherical transducer (Ø 260mm, weight 12 kg)
- Units acquisition mic to 32 + channels tacho
- Units acquisition cameras
- Notebook c / software
The new concept: "omni-directional" sound analysis
The fundamental of the noise and vibration improvement is the “sound radiation control”. To control the sound radiation, we have to know the “control point”, i.e. we have to know the most important sound source to contribute to the evaluation point. This process is called “analysis of sound sources”. Noise Vision is a new system with a concept to identify the sound sources efficiently.
What is the most serious problem in the conventional sound source analysis system? We think that it lies in the keyword “DIRECTION”. Noise Vision is a new system that can analyze the sound sources located at any direction.
The sensor of the Noise Vision is a sphere-shaped. It is quite unique as the sound-measuring instrument. On the surface of the sphere, the thirty one microphones are arranged. It is specially designed for the purpose to analyze the sound sources over whole direction with only once data acquisition.
The Goal: "Visualization of sound"
What is required for the future measuring instruments? We think one of the most important matters is “VISUALIZATION”. The sound is invisible. But we know it turns to be more intelligible and persuasive by expressing sound in visual form.
Noise Vision brushed up the technology of the visualization thoroughly. Twelve cameras are set on the surface of the sphere-shaped sensor. The sound source information is displayed over the photograph taken with the camera. So, you can recognize the cause of noise problem out clearly.
The need of speed
What is the value for the product development or service offering?
We think one of the most important matters is “SPEED”. Actually for noise control operation, to get the result for a shorter period is required.
Noise Vision has been improved thoroughly each work processes, such as “setup of the system”, “measurement”, and “analysis and reporting”, and has succeeded in large time shortening in each processes. It is apparent if you experience the Noise Vision. Noise Vision analyzes and visualizes the information of the sound sources rapidly. It frees the engineers from complicated measurement operations.
Reliability is mandatory
We have been helping various customers’ acoustic measurement and simulation system development. Moreover, the acoustic consulting service reached more than three hundred cases in a year. We promise the reliable support after system installation.
And we are also proposing acoustic measurement / consulting service using Noise Vision for various cases. In many cases, sound source analysis is carried out as troubleshooting. We offer the services with power and rapidness.
technical data
| Sensor (sphere-baffled microphone array with cameras) | |||
|---|---|---|---|
| Standard sensor | Medium sensor | Small sensor | Noise Vision Front-End |
| W338 x D275 x H855 (mm) (max.) | W300 x D240 x H840 (mm) (max.) | W228 x D200 x H822 (mm) (max.) | W400 x D330 x H265 (mm) |
| W338 x D275 x H680 (mm) (min.) | W300 x D240 x H640 (mm) (min.) | W228 x D200 x H610 (mm) (min.) | Built in AD converter |
| Diameter of the sphere : 260mm | Diameter of the sphere : 200mm | Diameter of the sphere : 165mm | Built in Camera Switching Unit |
| Weight : 7.8kg | Weight : 4.0kg | Weight : 3.6kg | Power input : AC/DC |
| Number of microphones : 31 | Number of microphones : 31 | Number of microphones : 31 | |
| Number of cameras: 12 | Number of cameras: 12 | Number of cameras: 12 | |
| Number of cameras: 12z | Application frequency from 260Hz to 6500Hz | Application frequency from 315Hz to 8000Hz | |
| Host PC | Data Acquisition |
|---|---|
| OS: Windows2000, Windows XP | Multi-channel sound acquisition function*3 |
| CPU: Intel Pentium 4 2.5GHz or higher | Input level monitoring function |
| Memory: 512 or higher (1GB or more is recommended) | Auto range function |
| HDD: 2GB or more | Photo capture function |
| Display resolution: 1024 x 768 (XGA) pixel or higher | Movie capture function |
| USB2.0 port (two or more) | Tacho-signal acquisition function (2ch) |
| ETHERNET (RJ-45) port (100BASE-TX or more) or PCMCIA/PCI slot (one or more)*2 | Trigger function (input level trigger, external trigger) |
| Input filter function (F, A, C) | |
| Frequency analysis (FFT) function | |
| Sound data playback function*4 | |
| Sound data export function | |
| Photo data export function |
| Data Analysis | Options |
|---|---|
| Sound source analysis function (Method: original method based on Beam-Forming ) | |
Frequency range*5:
200Hz – 5000Hz (standard sensor)
260Hz – 6500Hz (middle sensor)
315Hz – 8000Hz (small sensor)
|
Software for calculating the difference of analyzed data *8 Batch calculation*9 and creating animation*10 Automatic creation of report (Microsoft Powerpoint file)*11 Realtime analysis*12 |
| Analysis result exporting function*6 | |
| Analysis result copy function*7 |
*3: Possible recording time depends on the capacity of the harddrive of the host PC.
*4: A sound device is required on the host PC.
*5: Depends on the sensor to be used.
*6: Function to output the analyzed result as the Windows bitmap or the JPEG format.
*7: Function to copy the analysed result onto the clipboard.
*8: Function for visualizing the difference between several cases.
*9: Function to perform the analysis automatically under a pre-set calculation condition.
*10: Function to create the animation for the analyzed result.
*11: Function to create the PPT report automatically.
*12: Function for real-time sound source analysis and display.