ICP and IEPE same thing?

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https://community.sw.siemens.com/s/question/0D54O000061xkdmSAA/icp-and-iepe-same-thing

IEPE is a set of initials for “Integrated Electronic Piezo Electric”. It is a standard for electronics in transducers (like accelerometers and microphones) that have built-in amplifiers.

ICP is short for “Integrated Circuit-Piezoelectric”. ICP is a trademark name of PCB Corporation for their proprietary implementation of IEPE (hence it is the same thing). Other trademark names of IEPE from different companies include CCLD, IsoTron or DeltaTron.

Because Simcenter SCADAS hardware can power an IEPE accelerometer (by selecting ICP mode in the input mode of Channel Setup worksheet), it is not necessary to have an external amplifier.

You can just plug the accelerometer directly into the SCADAS as shown below.

An IEPE/ICP transducer cannot measure offsets because they are AC coupled, and all DC content is removed. Only dynamic data can be measured. The bias voltage supply for the transducer is a constant DC voltage which is supplied on the same wire as the signal, and is filtered out from the data by a high pass AC coupling filter.