Problems with the microphone?

Built-in microphone, macbook air 13 mid2012. Recently became very quiet microphone, the sides barely hear a voice. And, characteristically, pressing buttons and tapping of the body are transmitted perfectly. Sensitivity set at maximum, OS X 10.9 with the latest updates. Somebody faced?
October 3rd 19 at 03:05
4 answers
October 3rd 19 at 03:07
The most common causes are a clogged MIC hole or damaged microphone. The second treated only in the service. If tapping on the hull is captured well, more like the first problem. Still, given the location of the microphone, make sure nothing is blocking it.
Mika hole seems clean. Is it some kind of trail off? It turns out the service... Thanks. - Tianna.Blan commented on October 3rd 19 at 03:10
Yes, a plume that, on the face clogging the channel, try to clean or blow out. - Bella.Witting commented on October 3rd 19 at 03:13
October 3rd 19 at 03:09
Clogging of the holes vryatli so much can affect the sensitivity, if a finger even close to that acceptable audibility remains (checked just now on my air 13 2011). In practice there was one case that the microphone is off/shifted from the seat was bad audio. But there were a couple of "dead" microphones, and it is in airah, they're tiny and therefore probably less reliable. The fault of the Board and a glitch in the system cannot be ruled out, but this is unlikely.

The diagnostic algorithm of such a failure:
1 boot from external hdd test
2 to throw a different microphone
3 a different sound to throw the handkerchief (airah sound on a separate Board, magsafe Board)
October 3rd 19 at 03:11
I apologize if it is not the topic..)
Here's the situation. Poured me a MacBook Air 13' mid 2013. Went to do the repair, parts ordered (Motherboard, shawl supply, battery and touchpad) came installed. The system I put in place myself, from scratch (clean).
1. No sound and microphone does not respond to anything(((((( does not see the device output and input(setting> Sound...) and
2. FN button (upper row) do not meet their functions( do not adjust the light, volume etc.) but you can set other functions...(((

If it helps, I would be very happy and grateful.
October 3rd 19 at 03:13
Absolutely the same problem. Solved it so: took the microphone (you have to open the cover, remove the battery and speaker from the microphone), then the needle poked holes the microphone, blew, put everything back in the end, the MIC began working fine.

Perhaps it is enough just to poke holes with a needle and then blow it out. Just blow it did not help.

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