Valuable information on NoiseGard™

The NoiseGard™ principle

One of the greatest stress factors today is noise. Research has shown that noise affects the nervous system, and can cause tiredness, poor concentration, irritability and tension. Of even greater concern is the permanent damage to hearing that can result from noise at high levels.

This problem concerns pilots in particular. Cockpit noise amounts to about 80 dB(A) in jets and to 90 up to 97 dB(A) in turboprops. During takeoff and landing, the noise level is even higher. To be able to understand radio traffic in spite of the noisy environment, the ATC signal level must be set to at least 95 dB(A). Permanent hearing loss caused by the continuous noise in aircrafts is the reason why many pilots became prematurely disabled or lost their pilot´s license.

Circumaural communication headsets provide noise attenuating properties and are commonly used to address this problem. However, the noise attenuation of these headsets is uneven. High frequencies are reduced considerably, but low frequency wind and engine noise, the most prominent noise in many of today's aircrafts, is attenuated very little.

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Sennheiser HD400 manual Valuable information on NoiseGard, NoiseGard principle, 138
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HD400 specifications

The Sennheiser HD400 series represents a thoughtful blend of innovation, comfort, and superior audio quality, catering to both casual listeners and audiophiles alike. Renowned for their commitment to sound excellence, Sennheiser has integrated advanced technologies into the HD400 headphones, ensuring an immersive listening experience.

One of the standout features of the HD400 series is its exceptional sound quality, achieved through high-quality transducers that deliver a balanced and detailed audio spectrum. Whether listening to classical music or modern pop, users can expect clear highs, robust mids, and deep bass. This well-rounded sound signature makes the HD400 versatile for various genres and audio applications.

Comfort is paramount in the design of the HD400. The headphones feature plush ear pads and an adjustable headband, allowing users to enjoy long listening sessions without discomfort. The lightweight design further enhances usability, making these headphones perfect for both at-home listening and on-the-go use. Additionally, the ergonomic design ensures a secure fit, reducing sound leakage and providing an immersive experience.

Equipped with advanced connectivity options, the HD400 series primarily supports wired connections, ensuring minimal audio latency and maximum sound fidelity. This wired setup is complemented by a high-quality audio cable that provides flexibility and durability, crucial for everyday wear.

Sennheiser is known for its noise isolation technology, which is prominently featured in the HD400 series. This technology effectively blocks out ambient noise, allowing listeners to delve deep into their audio without distractions. This feature is particularly useful in crowded environments or during commutes.

Durability is another characteristic of the HD400 series. Constructed with high-quality materials, these headphones are designed to withstand daily use while maintaining their aesthetic appeal. Sennheiser also offers a limited warranty, underscoring their confidence in the product's longevity.

Overall, the Sennheiser HD400 series harmonizes comfort, sound quality, and innovative technology, making it an ideal choice for anyone seeking an elevated audio experience. With their thoughtful design and performance, they appeal to a broad audience, whether for casual listening or professional audio applications. The Sennheiser HD400 stands as a testament to the brand's commitment to audio excellence.
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