Sennheiser HMEC 302, HMEC 300, HMDC 322, HMEC 400, HMEC 322, HMEC 305-C, HMEC 306 manual 131

Page 21

Additional information for helicopter use of the HMEC 322 headset

The polarity of the microphone connection in helicopters is not standardized. If the microphone of your headset does not work with the existing polarity, you can reverse the polarity on the headset by simply rotating the microphone module. To do so, please proceed as follows:

1.Pull the wind screen from the microphone.

2.Loosen the screws by approx. half a turn.

3.Pull the microphone module from the boom-arm.

4.Rotate the microphone module by 180° .

5.Put the rotated microphone module back into the boom-arm.

6.Now tighten the screws from the other side.

7.Slide the windscreen over the microphone.

Rotating the microphone module does not change its acoustic properties. Due to its noise- compensating pick-up pattern, the microphone can be used from either side.

131

Image 21

Contents 111 Headset112 Preparing the headsets for use 128113 Safety tipsHeadset features Hmec 300 NoiseGard headset114 Hmec 302 NoiseGard headset Product variantsHmec 305 NoiseGard headset 115Hmec 306 NoiseGard headset Hmec 305-C NoiseGard headsetHmec 322 NoiseGard headset 116Hmec 400 NoiseGard headset Hmdc 322 NoiseGard headset117 Hmec 302, Hmec 305 and Hmec 306 headsets Delivery includes118 Recommended accessories Adapter cables except for Hmec 302, Hmec 305 and Hmec119 Connecting cables for headsets Connecting the headsetsHmec 305-C headset Hmec 322 and Hmdc 322 headsetsHmec 306 headset 121122 Powering options123 Connecting the headset to the on-board systemHeadset Hmec Headset Hmec 305-C124 LED operation and battery status indication Inserting / replacing the the batteries125 Connecting the headset, turning on the battery pack Attaching the battery pack to clothing126 127 Connecting the headsetPreparing the headsets for use Adjusting the headband128 Relocating the microphone boom Positioning the microphonePositioning the microphone towards the corner of the mouth 129130 131 Adjusting the volume Using the headsetsTurning NoiseGard on/off 132Folding up the headphones Adjusting the microphone gainAttaching the cable clip 133Replacing the wind screen Spare partsReplacing the ear cushions 134135 Replacing the headband paddingCase of difficulty ProblemPossible cause and what to do 136137 Valuable information on NoiseGard NoiseGard principle138 139 140 141 Connector assignmentHeadphones Technical dataMicrophone incl. preamplifier Hmec143 Hmec General data144 Hmec Hmec 305-C Hmdc145 Hmec Hmec 305-C Hmdc General data146 Certificate of Conformity

Related manuals

Manual 144 pages 33.98 Kb

HMEC 306, HMEC 305-C, HMEC 302, HMEC 305, HMEC 322 specifications

Sennheiser has long been recognized as a leader in audio technology, and its range of aviation headsets reflects this reputation. The HMEC 302, HMDC 322, HMEC 305-C, HMEC 300, and HMEC 322 models are designed for pilots and aviation professionals, combining advanced features, cutting-edge technology, and high-quality sound performance.

The HMEC 302 is renowned for its passive noise attenuation, which effectively blocks unwanted ambient noise while allowing clear communication. This model includes comfortable ear cushions and an adjustable headband, making it suitable for extended use. The lightweight design ensures minimal fatigue during long flights, and the sensitive microphone guarantees optimal voice transmission.

On the other hand, the HMDC 322 integrates active noise cancellation technology, providing an impressive level of sound isolation. This feature is especially valuable in noisy cockpit environments, where distractions can impact concentration. The headset also includes high-quality speakers that deliver crystal-clear audio whether for communication or entertainment, ensuring that pilots remain connected without compromising sound quality.

The HMEC 305-C is designed specifically for commercial pilots and features a robust, durable construction. This model is equipped with a high-performance microphone that offers excellent speech intelligibility, making it ideal for communication in loud environments. Additionally, the HMEC 305-C includes a flexible boom arm that allows precise positioning of the microphone for optimal voice clarity.

The HMEC 300 model focuses on delivering exceptional comfort and function. Its plush ear pads and lightweight materials create a snug fit that is ideal for long flights. This headset also offers a high level of sound isolation, making it perfect for pilots who regularly operate in high-noise environments.

Lastly, the HMEC 322 shares many characteristics with its counterparts. This headset is tailored for users seeking both comfort and superior sound quality. The advanced cushioning and adjustable features ensure that the headset remains comfortable during extended usage, while its robust materials are built to withstand the rigors of aviation use.

Overall, Sennheiser's HMEC series represents a blend of advanced technologies, comfort, and durability, making them essential tools for professionals in aviation. Whether through passive sound isolation, active noise cancellation, or exceptional voice clarity, these headsets cater to the demands of pilots who prioritize safety and performance in their communications.