Checking NVH Variability of Production Vehicles using 2250 Hand-held Analyzer

Simple to use and cost-effective, Brüel & Kjær’s Hand-held Analyzer Type 2250 provides accurate and instant results with the minimum of effort and investment. Type 2250 helps you improve the reliability and quality of vehicles and components. In fact, it has repeatedly proved its worth to a number of automotive manufacturers and suppliers with applications ranging from checking pass-by levels to in-vehicle assessments, and component testing.

Applications:

• In-vehicle noise measurements
• Check pass-by levels
• General noise testing of components 

Benefits:

• Real-time frequency analysis in 1/1- and 1/3-octave bands and total dBA level in large display. No post-processing necessary
• Easy to use – simple one button start/stop operation (or just start for specified analysis time)
• 120 dB dynamic range eliminates setting attenuators
• Quality and status of measurement parameters clearly displayed on-screen as icons and saved with data
• Backlit screen makes viewing easy under all conditions
• Record your personal comments during testing to document conditions, artefacts, etc.
• 8-hour uninterrupted operation from built-in battery
• Export Time data in wav. files to, for example, PULSE data acquisition and analysis system for further analysis
• User interface available in local languages
• Personal measurement, display, and job setup
• Quick transfer of data to PC (via USB, compact Flash, or Secure digital cards) for storing, viewing, and reporting

In-vehicle noise measurements

Whether you have a simple, A-weighted sound limit requirement, or need to perform a 1/3-octave test, Type 2250 is scalable to your requirements. It can be used as a hand-held device for easy portability. User-defined templates make switching between applications easy. The wide 120 dB dynamic range eliminates the need to set attenuators (the most common problem in testing), and you can preset the measurement time to reduce operation to one push of a button and to add consistency to your measurements. The included utility program makes it easy to keep track of results in an organised archive structure. A built-in memory buffer in the sound recording option makes it possible to record a squeak or rattle after it happens.

Check pass-by levels

Simply point and shoot Type 2250 or use microphone extension cable and tripod for spot check of pass-by levels on all types of vehicles – from cars and motorcycles to agricultural vehicles. Measure maximum “Fast” dBA level and acquire 1/3-octave spectra in parallel to get diagnostics information.