In LMS Test.Xpress Revision 4, the new noise and vibration analyzer delivers a newly integrated sound level meter, a new ISO 3747sound power standard for in-situ measurements and a triggered intensity functionality that assesses synchronous sound intensity even in noisy environments.
Discover other new features to help you engineer the right product right now
Discover other new features to help you engineer the right product right now
LMS Test.Xpress Revision 4 highlights
LMS Test.Xpress Sound Level Meter
LMS Test.Xpress Rev 4A comes with an integrated sound level meter that includes typical calculations like Leq, Lperc , LE, Lmax, Lmin and Lpeak.
LMS Test.Xpress Rev 4A comes with an integrated sound level meter that includes typical calculations like Leq, Lperc , LE, Lmax, Lmin and Lpeak.

- PC based integrating sound level meter
- Simultaneous multi-channel measurements on multiple points
- Sound level meter functions can be combined in real-time with more advanced analysis tools
This ISO 3747sound power standard calculates the radiated sound power value. This ISO standard helps users perform measurements in a non free-field environment using reference sound sources.
- Dedicated ISO standard to perform in-situ measurements
- Extension to the ISO sound power standards ISO 3741, ISO 3744, ISO 3745 and ISO 3746
- Full integration of ISO 3747 standard for in-situ measurements
LMS Test.Xpress Triggered Intensity
The triggered intensity function is a unique method to measured sound intensity in noisy environments by isolating specific harmonics. By synchronizing the intensity blocks with those frequencies, any intermittent noise is suppressed.
The triggered intensity function is a unique method to measured sound intensity in noisy environments by isolating specific harmonics. By synchronizing the intensity blocks with those frequencies, any intermittent noise is suppressed.
- Measures in noisy environments
- “Isolates” transfo specific noise
- “Isolates” any other frequency related noise


