Recent content by TrickyDick

There are control systems that are primarily designed for high level acoustic chambers that have the functionality you describe. You define the SPL "profile" and the system generates a broadband noise drive signal filtered to the given spectral profile. A microphone feedback signal...

How can I derive Modal mass parameters from the Modal-A results I have available. Thanks in advance.

Another possibility is the SmartOffice data acquisition, analysis and reporting family and there's a free trial download at www.mm-corporation.com. It's powerful, easy to use and a fraction of the cost. Good Luck.

Hi, I'm looking for some useful shareware (and preferably freeware!) vibration calculator tools to download and use up a bit more disc space. No specific application in mind at present but like a good boy scout just want to be ready! Thanks. ps if you havn't tried it take a look at:-...

Hi, I'm looking for some useful (and preferably free!) vibration calculator tools to download and use up a bit more disc space. No specific application in mind at present but like a good boy scout just want to be ready! Thanks. ps if you havn't tried it take a look at:-...

Hi, Also try out the freeby download at www.mpiuk.co.uk/vibsliderule.htm Enjoy!

When a broad band random vibration signal is FFT'd and an average PSD is calculated using an exponential average with a known number of DOF's what is the PSD amplitude uncertainty interval? eg what is the +/- dB variation within 95% confidence. Any statisticians out there? Many thanks ...

When a broad band random vibration signal is FFT'd and an average PSD is calculated using an exponential average with a known number of DOF's what is the PSD amplitude uncertainty interval? eg what is the +/- dB variation within 95% confidence. Any statisticians out there? Many thanks ...