BRAINWAVZ HM5 Over-ear Headphone Review
Considering that these headphones really don't go out of their way to block out noise, it's a pleasant surprise that they actually do a very good job of preventing pesky noise pollution from ruining your listening session. Though it does a great job of blocking out high-frequency noise, it really doesn't do so hot with low frequency noise, meaning car and truck engines will be almost as loud as they would be even if you weren't wearing these on your head at the time. This is fairly common, so it's nothing too huge to worry about.
Surprisingly enough, the HM5s do leak a fair bit of sound, though the results seem to vary from robot to person to person. If you have a habit of listening to music that may embarrass you if anyone ever learned your deep dark secrets, you may want to just keep your volume under control, lest you pester those around you with your tunes.
Maximum Usable Volume
Able to bump beats at a level of 116.58dB, the BRAINWAVZ HM5s can hold their own at volume. Still, if you must listen to music this loud, you should really limit how long you subject your poor ears to that kind of force, as you can easily damage your hearing permanently.