/usr/share/applications/pavumeter.desktop is in pavumeter 0.9.3-4build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | [Desktop Entry]
Name=PulseAudio Volume Meter (Playback)
GenericName=Playback Volume Meter
Comment=Monitor the output volume
Exec=pavumeter
Icon=audio-input-microphone
StartupNotify=true
Type=Application
Categories=AudioVideo;Audio;
|