Noise-cancelling Headphones

Sennheiser PXC 480 headphones with active noise cancellation.

Specifications:

Impedance: Active 150 / Passive 45
Transducer principle: (Microphone) Dynamic closed
Frequency response: 17 - 23000 Hz
Sound pressure level (SPL): 109 dB (1kHz/1Vrms)
THD, total harmonic distortion: < 0.5% (1kHz/100dB)
Ear coupling: Circumaural
Weight: 225 g
Noise cancellation: NoiseGardTM - Active Noise Cancellation