Posts

Sound & Vibration DAQ Tools: NI-9231 Module

NI-9231 CompactDAQ Module

When measuring noise and vibration levels, our engineers use the NI-9231 sound and vibration module, a CompactDAQ chassis and a Laptop running iTestSystem to collect and analyze data. The NI-9231 module is an updated, higher channel count version of the NI-9234 module.

The NI-9231 is an 8 channel, 51.2 kS/s/channel, -5 V to 5 V, C Series Input Module with IEPE excitation that can be turned on and off, and open/short circuit detection. To increase channel capacity, these modules use 10-32 plug for its sensor input connections. NI provides a PCB Low Noise Coaxial Cable, 10 ft w/10-32 plug to BNC plug to accommodate most standard accelerometer and microphone connections.

For more information about the NI-9231, iTestSystem or sound and vibration measurements, contact Ryan Welker via email: ryan.welker@itestsystem.com or phone: (844) 837-8797 x702

Quiet Please: ITM Tunes Into Importance of Measuring Sound Levels

Construction Site Noise Testing

Whether manufacturing vehicles, mining natural resources or operating machinery on a construction site, a single common factor can bring your operation and productivity to an absolute halt. 

That factor is noise. 

In a world where precision and performance rule, measuring and controlling sound levels can be crucial to the success of your product or project. The team at Integrated Test & Measurement (ITM) have developed a customized solution that not only measures and collects sound-level data, but will help your team identify the specific components causing all that noise. 

On-Site Sound Testing Capabilities 

ITM can assist with all types of sound testing on site including: 

  • Vehicle/Automotive Noise Vibration & Harshness (NVH) Testing  
  • Drive by Noise Testing  
  • Sound Level Testing  
  • Vehicle/Automotive Component Noise Testing  
  • Construction Site Sound/Noise & Vibration Level Monitoring  
  • Mine Sound/Noise & Vibration Level Monitoring  
  • ISO Noise Testing  

In each of these instances, their engineers will be packing a custom Sound Level Test Kit full of data acquisition hardware, microphones and more. The key to their equipment, however, is that each kit includes ITM’s proprietary iTestSystem software, an intuitive sound-level human machine interface (HMI) that allows for sound-level recording and reporting. 

Mark Yeager, ITM Lead Programmer, says building the capability within iTestSystem to measure microphone data now allows customers to look at a real-time display of sound-level measurements. 

Yeager says their crew can build out tests on site to do such things as measure pass-by noise, a process by which the team arranges mics inside a vehicle and along both sides of a 40-yard stretch then capture, monitor and analyze a vehicle’s sound and compare it to acceptable standards. By breaking apart the frequencies of components, they can even zero in on trouble spots such as a turbocharger on a car or a loud cooling fan on a piece of construction equipment. 

Measuring Dangerous Sound 

Yeager also points out the need to measure sound in places like construction sites or mines, where there may be concern over hearing loss for operators. According to the Centers for Disease Control, hearing loss can result from a single loud sound (like firecrackers) near your ear. Or, more often, hearing loss can result over time from damage caused by repeated exposures to loud sounds. The louder the sound, the shorter the amount of time it takes for hearing loss to occur. Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. The CDC advises that noise above 70 dB over a prolonged period of time may start to damage your hearing, and loud noise above 120 dB can cause immediate harm to your ears. 

Test-Ready Sound Level Kits 

If you have test engineers on-site and simply need the equipment to help you get to the bottom of your sound issues, ITM will ship their test-ready kit that includes a pair of pelican carrying cases packed with the following components: 

Whether your needs include on-site sound testing and analysis or you simply need the crucial equipment to measure sound and vibration levels yourself, ITM can help. 

ITM is a structural test & measurement engineering service and software company located in Milford, Ohio, that helps companies reduce costs and improve efficiencies in their product development, manufacturing, and production activities. ITM is a recognized NI Gold Alliance Partner that provides software development, structural and mechanical testing services, industrial monitoring, strain gauging, and data analysis solutions to clients around the globe.

For more information about sound and noise level testing or our sound level test system, contact Ryan Welker via email at ryan.welker@itestsystem.com or phone at (844) 837-8797 x702.