User manual BOSE AVIATION HEADSET X

[. . . ] The Bose® Aviation Headset Owner's Guide AM270261_00 V. pdf May 16 2003 DECLARATION OF CONFORMITY We, the offerer: Bose Corporation, The Mountain, Framingham, MA 01701-9168 USA Acknowledge our sole responsibility, that the product: Kind of equipment: Bose® Aviation Headset Type Designation: AHX-32-0# and AHX-34-0# In accordance with EMC Directive 89/336/EEC and Article 10(1) of the Directive, is in compliance with the following norm(s) or documents(s) Technical regulations:EN55013, EN55020 Accredited by: Bose Corporation, The Mountain, Framingham, MA 01701-9168 USA 15 June 2003 Bose Products B. V. Nijverheidstraat 8, 1135 GE Edam The Netherlands Nic Merks Vice President, Europe Manufacturer's authorized EU representative 2 AM270261_00 V. pdf May 16 2003 Cautions and Advisories Operational advisory The Bose® Aviation Headset is an active noise reducing (ANR) headset. As with any complex electronic device, it is possible for this headset to fail during operation. Symptoms of failure may include loud tones, distortion, and loss of communications signal in the headset when used in the ANR mode. [. . . ] Do not purse your lips. 3. Operating the battery powered headset If your headset is battery powered, read the control information below. If your headset is aircraft powered, refer to "Operating the aircraft powered headset" on page 23. The battery powered headset uses AdaptiSenseTM headset technology to supply the power your headset needs at any given time. Smart shutoff turns off the circuitry several minutes after you remove the headset. This maximizes available energy for longer life from the two batteries. Its brightness is adjustable for day/night operation. 20 AM270261_00 V. pdf May 16 2003 Using Your Headset Power button Use the power button to turn the headset on or off, or to change the LED brightness (Figure 18). Note: For details on how to disable smart shutoff, see "Changing the optional operation switches" on page 13. · Press twice rapidly to toggle between the daytime (brighter) and nighttime (dimmer) LED settings. Figure 18 The LED, volume control knobs, and power switch on the control module of a battery powered headset Battery power indicator Volume control (left ear) Volume control (right ear) On/Off control symbol Power button for On/Off and LED brightness setting LED brightness control symbol Volume control Notice the individual earcup controls Separate knobs on the control module control the volume for each separate earcup (Figure 18). Overall headset volume control requires adjustments at both the aircraft intercom or radio and at the headset control module. Even at its lowest setting, neither knob on the control module can completely turn off the volume. Exposure to loud sounds may cause hearing damage. 21 AM270261_00 V. pdf May 16 2003 Using Your Headset Holding the control module upright and facing you: · Use the left knob to adjust volume in the left earcup. Controlling the volume of a single battery powered headset With ANR on: 1. Turn each volume knob on the headset control module down to decrease, or up to increase the volume of the earcup it controls. Volume control using multiple headsets When an aircraft has more than one headset connected to its audio system, the pilot in command should adjust the volume of his/her Bose® Aviation Headset as follows: 1. Turn each volume knob on the headset control module up to its maximum setting. Adjust the master volume on your aircraft intercom or radio until you can hear communications clearly. Note: This should be done in a noisy environment. Adjust the volume knobs on the headset control module to balance the volume between the left and right earcups. Turn down the aircraft intercom or radio master volume to the level you prefer. After the pilot's headset volume is set, passengers may adjust the volume of their headsets. Have them follow steps 1 and 2 under See "Controlling the volume of a single aircraft powered headset" on page 24. Battery power indicator New alkaline AA batteries (IEC LR6) will generally supply 30 to 40 hours of power for the headset. Battery life varies with the ambient noise level of the aircraft, temperature, ear cushion condition, and age of the batteries. 22 AM270261_00 V. pdf May 16 2003 Using Your Headset An LED, located on the control module, changes color to indicate the power status, as follows: LED Color Type of light Green Amber Red Off Blinking Fast blinking Faster blinking None Indicates Power ON and batteries good Power ON, but batteries low (8 hours or less remaining) Power ON, but batteries very low (2 hours or less remaining) Power OFF or batteries discharged Operating the aircraft powered headset Power switch Turn on ANR by setting the power switch to ON (Figure 19). Figure 19 The volume control knobs and power switch on the aircraft powered headset control module Volume control (left ear) Volume control (right ear) Power switch Volume control Overall headset volume control requires adjustments at both the aircraft intercom or radio and at the headset control module. Even at its lowest setting, neither knob on the control module can completely turn off the volume. 23 AM270261_00 V. pdf May 16 2003 Using Your Headset CAUTION: Avoid setting the volume levels too high. [. . . ] · Inspect the seal between the ear cushion skirt and the earcup. Replace any cushions that have surface tears, torn stitching joints, large wrinkles, or have become dried and stiff. Crackling sound audible with · Adjust the earcup fit to eliminate the crackling sound. Refer to headset turned on in a loud "Wearing it properly" on page 19. environment, or ANR is inter· If your headset is battery powered, check to see if the battery is mittent low (indicated by fast blinking red LED). [. . . ]