You could also try phoneAlarm.
www.pocketmax.net Gives you some really good options. I have mine set to vibrate and ring. It vibrates then starts ringing in the middle of 1st vibe. Not sure there is the pulses,but, you get profiles that you can change b4 u go into the meeting so all events would vibe or anyother setup you want. I think it is btwn $5 and $10. I think it is worth it bcoz the developer is very responsive to issues.