Circuit design, for voice operated puller

I am looking for a voice operated 2-channel circuit for solitary clay target shooting. Push one or two buttons and voice-operation option are active for 20 seconds, if no voice-command during those 20 seconds -> shut down voice option if voice-command -> output/outputs high and shuts down after 1 second. Adjustable sound level. User can select either push button 1 or pushbutton 2 (for single targets) or both 1 and 2 for simultaneous targets. Output connecting to a 2-channel RF-module 433.92 mHz. I have RF-modules that maybe could be used for this purpose, depends on how much space you need for the voice-circuit. PCB-size: 88x40 mm (inner space limit 5 mm on push button side, inner space limit other side 9 mm) I have loads of a certain transmitter casing and want to use it for this purpose. 5 pcs to start with, I will send you casings to make sure PCB fits. I dont know if the MC2830P is suitable for this project, I have some in stock, let me know your opinion.