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Noise is affecting the quality of our listening is an important external factors, and in today's ubiquitous noise, noise reduction technology to solve this problem is born. Can effectively reduce the ambient noise is what we call noise Beats By Dre, before we Earphones and large ear design Beats By Dre Australia , have been classified as passive noise reduction headphones; and rocketfish swordfish this Dr Dre Beats is used in setting up a special noise reduction circuitry, usually through the audio receiver (such as miniature microphone) and anti-noise output chip, receive, analyze the frequency of the external noise (eg 100Hz ~ 1000Hz) and generate its opposite frequency, reduced or offset each other to achieve the shielding effect of noise, known as active noise reduction headsets. Active noise reduction headsets with its own mechanism for noise reduction, noise reduction circuit, this feature requires an additional power supply, so generally you need to install the battery. rocketfish swordfish fidelity noise canceling headphones Dr Dre Beats Studio an independent electronic noise reduction, perfect sound (up to 99% efficiency cut off from the surrounding noise), large-diameter 40mm speaker driver units, 100dB/mW sensitivity for all types of music expression are very good, perfect control of the magnificent classical music, jazz, delicate, pop-rock shock. TheMonster Beats by Dr Dre Tour also perfectly compatible with a variety of digital devices, as Apple's long-term third-party partners, in the iMac, iPhone, iPad, there is more surprising performance.