One of the more perplexing things for new (and old) ultrasound inspectors is what conclusions to draw from their data and trends. The new i-Phone app from SDT North America is designed to make sense of ultrasound trends and baseline increases. For instance, if your baseline is 20dBµV and today's reading is 26dBµV and you want to know what the 6dBµV increase represents, tap it on your iPhone and you'll know the increase is a factor of 2X.