Microphone Suggestions

[Spaghetti]

I want to add an external mic to my action cam to record exhaust and engine sound. I have both a Sony AS200V and a Hero 4. The Sony is a great camera but a pain to attach an external mic on after it's locked in its plastic case. There is no opening at the bottom of the camera where the mic input is located.

 

I have looked at a number of options but would like to learn if others already went through the experience. These are some go pro mic I've found:

 

Looks good for a high speed mount: http://www.amazon.com/dp/B01A3LUBWC/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2LSZTOQRVEQ76&coliid=I2MY4R56OTBWIR

 

Another nice mount adaptor but I doubt the arm will survive at 140mph: http://www.amazon.com/dp/B00XU0DLLM/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=2LSZTOQRVEQ76&coliid=I2BU7JP3AY197U

 

Another one: http://www.bhphotovideo.com/c/product/1195285-REG/polsen_gpmk_22_gopro_production_microphone.html

[rchase]

If I were trying to get sound off of a moving bike I would go small and hide it under the bodywork.

 

http://www.amazon.com/Nady-LM-14-Uni-Directional-Lapel-Microphone/dp/B005FYH112/ref=sr_1_6?s=photo&ie=UTF8&qid=1454475497&sr=1-6&keywords=lapel+microphone

 

Something like that could be run under bodywork and has a lower probability of coming off the bike at high speed due to the wind protection. They have cheaper models starting at as little as $7.99 and up but I'm not really sure of the quality. You could modify the clip and put a screw through it and attach it to something solid and use zip ties to attach it to solid points.

 

You could also probably get away with using a Y adapter to connect multiple mic's to your camera to get multiple area's of sound but the loudest sound will always win out in the recording.

 

Another option would be to use multiple mics and attach those individually to separate digital MP3 recorders. Syncing the time would be a bit tricky but a hand clap or other loud noise right after all the recorders were started would give you a sync time. You could hide the recorders in the tail or under the bodywork as well. You could mic exhausts, intakes and other parts of the bike directly and combine the sounds as separate tracks when you are doing your video editing. That would give you complete control over the sound track as you wanted it to sound.