Sennheiser S1 DIGITAL Brochure - Page 3

Digital Adaptive NoiseGardTM Superior Protection - Highest Safety. dB SPL 110 105 100 95 90 85 80 75 70 65 0.1 Noise compensation in a propeller aircraft: Passive attenuation Active compensation with inner microphones Active compensation with outer microphones 1 10 kHz Pilots in flight are constantly confronted with extreme noise - whether from aircraft engines or wind. Thanks to NoiseGard™/digital, Sennheiser is now offering pilots the best noise-canceling performance ever. NoiseGard™/digital is the next generation of Sennheiser's NoiseGard™ technology. The fully adaptive digital noise-reduction technology can be quickly optimized for changing noise environments by a touch of a button, taking into account the actual noise situation for the pilot. Unlike analog noise compensation, which works with set filters, the fully adaptive NoiseGard™/digital measures the spectrum and intensity of the surrounding noise when the pilot presses the Smart Update button. At the core of the new noise-cancelling technology is a powerful digital signal processor, which generates a filter algorithm that specifically reduces the dominant noise spectrum. By analyzing both the frequency band and the noise peaks, the filters can be perfectly adapted to the situation at hand. In order to pick up the surrounding noise as accurately as possible, two external and two internal microphones are used. Usually, the antinoise signal is calculated by microphones integrated either on the outside or on the inside of the ear cups. Microphones on the outside directly pick up the noise generated by the engines and air flow over the plane, enabling a broadband noise reduction. Microphones fitted inside the headphones, on the other hand, pick up the sound signal close to the ear. This sound can vary - above all, depending on how well the headphones fit (different head shapes, if glasses are worn, etc.). Internal microphones generally offer very good performance in the low-frequency range. NoiseGard™/digital combines the benefits of both systems: the combination of external and internal microphones ensures a significantly better overall noise reduction and thus more safety and comfort for the pilot. S1 DIGITAL - A Masterpiece Made in Germany. S1 DIGITAL For the development of the S1 Digital, Sennheiser found a perfect partner in BMW Group DesignworksUSA. The result of their collaboration is a unique aviation headset that offers the ultimate in audio quality and noise cancellation thanks to NoiseGard™/digital in combination with sophisticated, innovative design. A black, metallic finish and the exclusive use of the highest-quality materials lend the headset an aura of elegance and calm self-confidence. In addition, the S1 Digital also features impressively simple controls and superb wearing comfort. Bluetooth wireless interface for connection to cell phones and MP3 players makes listening above the clouds an unforgettable experience. S1 DIGITAL 04 05