Title: disappointing performance
Product review: You will find this product valuable if you are looking for headphones to use while travelling on airplanes, because this product does a good job of blocking the kind of low-pitched, continuous hum that is produced by airplanes, air conditioners, etc. It does a poor job, however, of blocking all other sounds, such as voices, television, music, etc. In fact, I tried this product while sitting in front of a television set working at a moderate volume, and I could hear the sound pretty much as well as I could without the headphones on. Since I do not travel on airplanes frequently enough to justify this purchase, I returned the headphones, since they were pretty much useless to me in every other context.
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