Sennheiser HMEC 306, HMEC 300 manual Adjusting the microphone gain, Attaching the cable clip, 133

Page 23

Mic Gain Adjustment

Adjusting the microphone gain

According to JTSO approval C58a, the microphone output voltage has to be factory- preset to 400 mV. If this output voltage is too high or too low for your intercom system, it can easily be re-adjusted on the microphone. To do so, use a small slotted screwdriver and turn the ”Mic Gain Adjustment” screw (see illustration on the left) until you reach the desired setting.

Attaching the cable clip

The headphone cable can be fixed by means of the cable clip. Guide the headphone cable through the metal cable clip as shown in the illustration on the left. Attach the cable clip to your clothing and then loop the cable through the clip so that the headphone cable doesn‘t disturb you.

Folding up the headphones

For easy and space-saving transportation, the earcups can be folded up and tucked between the headband.

Unfold the headphones by grasping both earcups and pulling them down and away from the headband.

133

Image 23

Contents 111 Headset112 Preparing the headsets for use 128113 Safety tips114 Headset featuresHmec 300 NoiseGard headset 115 Product variantsHmec 302 NoiseGard headset Hmec 305 NoiseGard headset116 Hmec 305-C NoiseGard headsetHmec 306 NoiseGard headset Hmec 322 NoiseGard headset117 Hmec 400 NoiseGard headsetHmdc 322 NoiseGard headset 118 Hmec 302, Hmec 305 and Hmec 306 headsetsDelivery includes 119 Recommended accessoriesAdapter cables except for Hmec 302, Hmec 305 and Hmec Connecting cables for headsets Connecting the headsets121 Hmec 322 and Hmdc 322 headsetsHmec 305-C headset Hmec 306 headset122 Powering options123 Connecting the headset to the on-board system124 Headset HmecHeadset Hmec 305-C 125 LED operation and battery status indicationInserting / replacing the the batteries 126 Connecting the headset, turning on the battery packAttaching the battery pack to clothing 127 Connecting the headset128 Preparing the headsets for useAdjusting the headband 129 Positioning the microphoneRelocating the microphone boom Positioning the microphone towards the corner of the mouth130 131 132 Using the headsetsAdjusting the volume Turning NoiseGard on/off133 Adjusting the microphone gainFolding up the headphones Attaching the cable clip134 Spare partsReplacing the wind screen Replacing the ear cushions135 Replacing the headband padding136 ProblemCase of difficulty Possible cause and what to do137 138 Valuable information on NoiseGardNoiseGard principle 139 140 141 Connector assignmentHmec Technical dataHeadphones Microphone incl. preamplifier143 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.