Here’s something that calls out to be adapted for musical purposes – the $29 Sonic Nausea:
Sonic Nausea is a small electronic device which can really turn one’s stomach. It generates a unique combination of ultra-high frequency soundwaves which soon leads most in its vicinity to queasiness. It can also cause headaches, intense irritation, sweating, imbalance, nausea, or even vomiting.
The unique soundwave characteristics make directional source determination difficult.
Powered by one 9-volt battery (not included). For extended run time six AA batteries in a battery pack with transistor clips (available from most electronics stores) can be used instead.
Use with extreme discretion.
Sound a little hyped up; do you think that a little battery-powered device can really trigger waves of nausea using sound?