Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sound is "buzzy", but tolerable

The buds fit well and do block out noise. However, it seems that some of the blocking is due to a persistent buzz (or hum) in the background. I didn't use the earbuds for quite some time so too late to return. I tried them on a desktop, laptop and MP3 player. The least buzz was with the MP3 on a plane.Would not buy again, but maybe I just got a lemon. They come with different size earbuds so you get a good fit.