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Most of meteors lit up at altitude 80 to 100km. That means that any sound they may produce would reach ground observer 3 to 4 minutes (providing that meteor was directly overhead) after the sighting. There are reports of people hearing hissing sounds while watching large meteor. As this cannot be the sound of meteor reacting with atmosphere as there is not time delay, some scientists explain it that meteor during the interaction with atmosphere generate VLF radio waves. Some thin objects on the ground vibrate when receive those VLF signals, producing hissing sound.
Also there seems to be very few meteors that produce sonic boom. Most of meteors burn up at very high altitude where air is very thin and they are surrounded by plasma that seems to inhibit sound transmission.
I have personally never heard meteor sound, but my next project will be to add microphone with parabolic dish to my meteor capture camera.
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