User manual SENNHEISER HMEC 352

[. . . ] HMEC 350/352/355 355-C/356/372/450 HMDC 372 Instructions for use Contents Safety tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Headset features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Product variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Delivery includes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Make sure that you can hear critical sounds such as warning alarms. 22 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. 23 Spare parts The following spare parts are available from your Sennheiser agent: · · · · · · · Wind screen for MKE 45-1 Ear cushions for all variants except HMEC 450 Ear cushions for HMEC 450 Soft ear cushions for HMEC 450 Headband padding MZQ 2002-1 cable clip Carry and storage bag with shoulder strap Cat. 078366 Replacing the wind screen If the wind screen shows signs of wear such as tears or holes, replace the wind screen. Pull the wind screen from the microphone. Gently slide-on the new wind screen and ensure that it fits securely over the microphone. Replacing the ear cushions Replace the ear cushions if they are damaged. Grasp behind the ear cushions and pull them up and away from the earcups. Fix the new self-adhesive ear cushions to the earcups. For best results replace the ear cushions after 100 hours of use or two years. 24 Replacing the headband padding Replace the headband padding if it is damaged. Pull the Ziploc type fastening strips of the headband padding apart and remove the worn headband padding. Put the new headband padding around the headband. Pull the two edges of the headband padding together so that the fastening strips slightly overlap. Replacing the headband padding of the HMEC 450 headset Replace the headband padding if it is damaged. Open the snaps on the headband padding and remove the worn headband padding. Put the new headband padding around the headband. Pull the two edges of the headband padding together and close the snaps. 25 Valuable information on NoiseGardTM The NoiseGardTM 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. [. . . ] 15 hours 31 Technical data HMEC 355 Headphones Transducer principle Ear coupling Frequency response Nominal impedance active/passive Attenuation (active and passive) Max. sound pressure level Contact pressure dynamic circumaural, closed 45­15, 000 Hz 300/150 , mono > 25­40 dB 120 dB (±5 %) approx. 10 N 50/35 , mono HMEC 355-C HMEC 372 HMDC 372 Microphone incl. preamplifier Transducer principle pre-polarized condenser mic capsule, noise-compensated, MKE 45-1 dynamic mic capsule, noise-compensated, M-87/AIC 500­4, 000 Hz 1. 8­4 µV / 74 dB at 5 ­ ­ ­ ­ Frequency response Sensitivity Max. [. . . ]