Soundonce
soundonce <sound number>
Plays the sound <sound number> as defined by definesound the same way that the sound command does, except that the same sound may not begin playing again until the current instance of it has finished.
soundonce <sound number>
Plays the sound <sound number> as defined by definesound the same way that the sound command does, except that the same sound may not begin playing again until the current instance of it has finished.