JBL Reference 510 Guia Del Usuario página 3

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How Your JBL Reference Works
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The JBL Reference 510 reduces outside noise by up to 70% through its active-noise
canceling circuitry. Embedded in the headphones are miniature microphones that measure
the environment's sound levels. Based on those measurements, the noise-canceling circuit
cancels or reduces any unwanted sounds. As you can see in the graph below, the JBL Refer-
ence 510 smoothes out the high and low peaks of noise from the outside world, making
your music-listening experience or quiet leisure time interruption-free.

Document Number: 995-0012-001 Description: JBL Reference 510 Manual