If you travel a lot or want to concentrate on your work in an open-plan office, you should take a closer look at noise-canceling headphones.
noise cancelling
the t.bone HD 2000 NC
Affordable Over-Ear Headphones with Noise-Cancelling Capabilities
The t.bone HD 2000 NC is a closed headphone design with noise cancellation as standard, along with wireless operation via Bluetooth and an integrated microphone so you can keep up with calls on the move. All of this is offered for a very reasonable price.
Nura Nuraphone
Over-Ear/In-Ear headphones with audio monistoring active noise cancelling and Bluetooth