Audio specialist Sennheiser is expanding its broad line of noise-cancelling travel headphones with the CXC 700 ear-canal phone. The CXC 700, which was previewed at the Consumer Electronics Show earlier this year, features Sennheiser’s exclusive NoiseGard™ /digital system, which allows travelers to choose from three noise-cancelling modes optimized to reduce low, medium and high frequency noise.

Mode 1 is effective on low-frequency noise in particular (100 to 400 Hertz), such as engine noise from trains, buses or small passenger planes. Mode 2 focuses on cancelling noise in the medium frequency range (400 to 3,000 Hertz), which is caused mostly by air-conditioning systems in large passenger ... »read more

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