The SoundEar 3 Noise Processor mounts on the wall to monitor and record the sound levels. The digital display usually shows the current sound level, but this can be switched off or even set to display the time.
The SE3-320 Noise Processor is part of the SoundEar 3 range of products. It is technically identical to the SoundEar 3, but without the display.
Its purpose is to continuously monitor the sound levels, recording the sound level for download to a computer via memory stick. It can also be linked directly into an existing process control system via the 4-20mA Current Loop or the DC output.
The SE3-320 Noise Processor has a large internal memory, to which it can store various sound level parameters every second. It can store the Fast or Slow sound level with "A" or "C" frequency weighting. You can select whether it stores all of these parameters or just the ones you need. When you plug a memory stick in the SE3-320 will automatically transfer the measurements on to it. You then plug the memory stick into your computer to load the measurements into the SoundEar software.
For even longer term storage the SE3-320 can be set to store the measurements directly to a memory stick that is left plugged in, giving an almost unlimited storage time.
The SE3-320 can be linked in to existing monitoring and process control systems, or you can develop your own monitoring system, using either the DC output or Current Loop output.
This is a standard method of electrical signalling, used by many process control systems, with the benefit that the signal is not degraded by voltage drops in the wiring. For more information please visit the Outputs page.
The DC Output from the SoundEar 3 Noise Processor provides the measured sound level over a range of 0 to 10V DC, which can be measured using a basic A-D converter. For more information please visit the Outputs page.
The digital display on the SE3-320 usually shows the current sound level, updating every second. However, it can be set to any of the following:
Turning the display off or displaying the time can be useful to avoid people making noise just to see the display change.
The SoundEar 3 Noise Processor (order code SE3-320) is for long term noise monitoring in areas where you don't need to immediate and clear noise warning that is provided by the standard SoundEar 3 Noise Warning Signs.
For the long term monitoring of noise levels in:
When downloaded to a computer you can easily identify the noisy times of day and the limits reached.
The weatherproof version, order code SE3-320W, is protected against the weather and dust, rated to IP65. It can be mounted to a wall outside with four screws. A 10m (32 ft) power cable is included, to connect to the indoor power adapter that is also included.
More information on the Outdoor Noise Processor page.
Many process control systems can accept analog signals meeting the 4-20mA current loop standard. The standard SoundEar 3-320 (order code SE3-320) has two 4-20mA current loop outputs, which can be configured using the software included.
There is more information on the Outputs information tab.
The SoundEar 3-320 Noise Processor has two DC outputs that can be used for integration with your own applications. Typically connected to an A/D converter, the sound levels can be monitoring continuously.
For more information about the DC voltage output, please visit the Outputs tab.
The SoundEar 3-320 is usually wall mounted, using the mounting plate and security screw that are included. As long as there is a power outlet nearby and a surface that can accept four mounting screws, there are few limitations on the physical location of the device. The most important consideration is that it is in the most suitable position to measure the noise levels.
The installation consists of the following steps (also covered in the user manual):
An optional microphone extension cable can be used to mount the microphone away from the unit itself.
The SE3-320 comes complete with a plug-top power adapter. This provides the safe low voltage that the noise sign requires.
Extension Power Cable - The power adapter that is included uses a 5V USB style cable. This is convenient as both power supply and cable are readily available if they need replacing. However, USB cables are not suitable for more than a few metres. If you need to run power for a longer distance then you need the PSU24DC power adapter with one or more POWEX10 extension cables.
The SoundEar 3-320 Noise Processor comes complete with software to configure, download and display the results.
The outputs can be configured too:
The software is included with the SoundEar 3-320 at no extra charge. It is designed for all recent versions of Windows. It communicates with the noise processor via the computer's USB port. Downloads and configuration can be carried out via a memory stick, so you don't have to take the processor down from the wall each time.
With a SoundEar 3-320 connected to the computer's USB port, the software can show the sound levels in real time.
To download historic measurements it is not necessary to connect the processor to the computer. You can plug a standard USB stick into the sign and it will automatically transfer all its measurements. With the memory stick connected to the computer the SoundEar software will now download the measurements. In the image above you can see the sound levels graphed over a 24 hour period.
Using the software you can set the output from the sign to be either a DC level (0 to 10V) or current loop (4-20mA) for integrating into other logging and monitoring systems. You can also set the minimum and maximum sound levels that are then mapped onto this DC or current loop output. For more information, please visit the Current Loop and DC Output pages.
The SoundEar 3-320 stores noise measurements in its internal memory. You can configure it to store a minimal amount of information for longer, or to store everything for a shorter period of time. For example, storing the "A" Weighted Slow Sound Level every second will fill the internal memory in just over 90 days.
Not enough? You can configure the sign to store the measurements directly to a memory stick, giving almost limitless storage times.
The SoundEar software can configure the sign's digital display to show:
Although the default is to show the sound level, it can be useful to turn this off if it causes confusion (not everybody understands dB) or if it causes people to make noise to see how loud they are!
If you have a Sound Level Calibrator and need to ensure the accurate operation of the SoundEar 3-320 then the software deals with this. Connect the SoundEar 3-320 Noise Processor to the software, connect a microphone extension cable and fit the calibrator to the microphone. The software Microphone Calibration option will then deal with the process of checking and adjusting.
The SE3-320 Noise Processor has two outputs available. These outputs can be configured to either:
Each of the outputs can be configured to provide:
The range of dB measurement covered by the DC voltage or 4-20mA loop is set using the software.
The SoundEar 3 Industrial comes with two powering options: USB (5V) or 24VDC. When using the current loop or DC output the unit must be powered by 24VDC, it will not work with the USB power option. For convenience, the 24VDC power connections are on the same connector as the current loop outputs and ground.
At the rear of the noise warning processor there is a connector block. This connector pulls out of its socket and contains screw terminals to connect the following:
The Noise Processor includes standard 4-20mA Current Loop outputs. These provide a signal that does not degrade due to resistance, allowing for longer cable runs, limited by the ability to drive the current.
The Noise Processor also includes DC Voltage Outputs that are proportional to the measured sound level. They are ideal for level recorders and input to data logging systems.
There are two current loop / DC outputs on the SE3-320, so you can select two different parameters to monitor. Both outputs are set to the same measurement range, but you can select different parameters, as described below.
Each output can be one of the following noise measurement parameters:
The overall measurement range of the Noise Processor is 30dB to 120dB. You can process this whole range over the current loop or DC voltage output, or you can select the range of interest.
In the example above, the first output is the average sound level every second (probably the most useful parameter available) while the second output is the average over a 15 minute period. A sound level of 50dB will be the minimum (4mA) and a sound level of 90dB will be the maximum (20mA).
The standard SoundEar 3-320 order codes (SE3-320 or SE3-320-x for multi packs) include everything needed for most applications:
The SE3-320-x Multi Packs include all these items for each SoundEar 3-320. They also include an NM102 Hand Held Sound Level Meter, which can be used for making quick measurements of sound levels in the surrounding area, and can be helpful when setting the noise processor up.
|SE2-320||SoundEar 3-320 Noise Processor|
With data logging and 4-20mA current loop / DC output. Includes microphone, power adapter and software.
|SE3-320-5||Pack with 5 Noise Processors and a Sound Meter|
This package includes five SoundEar 3-320 processors and a hand-held sound level meter.
|SE3-320-10||Pack with 10 Noise Processors and a Sound Meter|
This discounted package includes ten SoundEar 3-320 processors and a hand-held sound level meter.
|PSU24DC||24VDC Power Adapter|
The SoundEar can also be powered by 24VDC. This is needed for the POWEX10 power extension cable.
|POWEX10||Power extension cable 10m|
Working at a greater distance from the power outlet. Requires the 24VDC Adapter (PSU24DC) - does not work with standard power supply.
|Frequency Range||20Hz to 20kHz|
|Measuring Range||30 to 120 dB|
|Deviation||± 0.5 dB|
|Frequency Weighting||"A" ("C" weighted Peak)|
|Time Weighting||Fast and Slow|
|Digital Display||dB(A) Slow, LAeq15, Alarm settings, Clock|
|Outputs||"A" weighted, 0-10V or 4-20mA|
|USB Ports||1. Micro USB (power and PC connection)|
2. USB Controller (for USB memory stick connection)
|Internal Memory||16MB (128MBit) - 5 to 90 days depending on settings|
Easily extended using memory stick
|Dimensions||121 x 149 x 43 mm, 4.8" x 5.9" x 1.7"|
|Weight||470 g, 1lb 6oz|
|Power||5 VDC (micro USB) or 24 VDC (screw terminal)|
|Acoustic Standards||IEC61672-2-2002 Class 2, ANSI S1.4 Type 2|
with P-SE3-MED adapter
|60601-1: Medical electrical equipment|
Part 1: General requirements for basic safety and essential performance.
60601-1-2: Medical electrical equipment
Part 1-2: General requirements for basic safety and essential performance.