I think not only is the carrier too high for our ears to hear, but also too high for the grass to vibrate at. (500-800 kHz is pretty fast, Hence, the mechanical

I think not only is the carrier too high for our ears to hear, but also too high for the grass to vibrate at. (500-800 kHz is pretty fast, Hence, the mechanical damping!) I think I'm pretty close, but I need Smarter Every Day on this one!