The Olympus LS-7 has a voice guidance feature that gives audio annoucements of recorder operating conditions.  You an adjust the speed and the volume of the guidance annoucements as well as enable or disable this feature.

To Enable the Voice Guide, turn the recorder ON.  Go to: Menu > LCD/Sound Menu > Voice Guide and select ON.

I have attached the Olympus LS-7 User Manual for your convenience. Manuals/LS-7_Detailed_Instructions_EN.pdf

Verification Source:  Page 72 of the Olympus LS-7 User Manual