The MOONDROP Blessing 3’s noise isolation performance is okay. They’re IEMs, so they don’t have noise cancelling and rely on their passive capabilities to help cut down background noise. They barely reduce low-frequency noise like the rumbles of bus and plane engines, which can be frustrating if you want to block out noise during your commute. On the upside, the buds can isolate you from ambient sound like voices and the high-pitched hum of AC units very well.
There’s a peak in the response above zero in the high-mid range. When isolated, these frequencies sound subjectively louder within our test box than when the headphones are off. We’re currently investigating this issue and will update this review when possible.
