Issues with electret microphone analog output signal

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i'm working on simple project consists of adafruit neopixel ring (https://www.adafruit.com/product/1463) , sparkfun electret microphone breakout board (https://www.sparkfun.com/products/12758); when user claps, ring changes animations. however, noticed strange occurrence when have microphone , neopixel ring connected same 3.3v power source on arduino. whenever wire them this, ring works fine microphone's analog output signal increases until reaches max, when room quiet. when connect ring 5v , microphone 3.3v (different power sources), problem doesn't occur , project works perfectly. can explain causing issue?

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neopixel ring connected same 3.3v power source on arduino
let's clarify - using 3.3v arduino or using "regular" 5v arduino , taking power out of 3.3v pin?

the 3.3v pin on 5v arduino (such uno) can't supply power.   in case, 3.3v power supply may not able supply current required neopixel ring.   so, 3.3v may dropping or may noisy when powering leds.


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