What does SPI stand for?
SPI stands for "Soft Phonation Index"
How to abbreviate "Soft Phonation Index"?
"Soft Phonation Index" can be abbreviated as SPI
What is the meaning of SPI abbreviation?
The meaning of SPI abbreviation is "Soft Phonation Index"
What does SPI mean?
SPI as abbreviation means "Soft Phonation Index"
