Bose Aviation Headset X Manuale utente

The Bose

Aviation Headset X

Owner’s Guide

Safety Information

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 X

Type Designation: AHX-02, AHX-03, AHX-04, AHX-05,

AHX-06, AHX-07, AHX-08

is in compliance with the following norm(s) or document(s):

EMC-directive 89/336/EEC

Accredited test laboratory:

Mikes Product Service GmbH, Ohmstrasse 2-4, D-94342

Stasskirchen, Germany

EC Certificate of Conformity #: E9 99 03 14490 008,

TCF#: Z16260

Bose Products B.V. Nic Merks

Nijverheidstraat 8, 1135 GE Edam Vice President Europe

The Netherlands Manufacturer’s authorized

EU representative

5 April 1999

Cautions and Advisories

Operational advisory

The Bose

Aviation Headset X, an active noise reducing (ANR) headset,

is a complex electronic device. As with any complex device, it is

possible for this headset to fail during operation. Failure may include

loud tones, distortion, and loss of communications signal in the

headset when used in the ANR mode. The headset includes redundant

circuitry to reduce the effects of such failures.

Note

: Such failures could prevent continued use of the headset in the

ANR mode.

The headset is in the ANR mode when the control module power

switch, shown in Figures 5 and 6, is set to ON. The headset is in the

passive mode when the power switch is set to OFF.

If you experience loud tones and the related loss of communications,

turn off the power switch. The headset will continue to provide com-

munications in the passive noise attenuation mode.

If you own a battery powered headset, it should be connected only to

the battery power. An aircraft powered headset should be connected

to the aircraft power sources only as described in this guide. The

aircraft powered headset will not operate properly if used with a Bose

Series II battery pack or with any commercial battery pack.

Hearing safety

Note

: The headset is intended to be used with ANR turned on. Noise

reduction and communications performance are reduced with the

headset turned off.

Volume control

The volume controls affect the volume of the communications signal

coming into the headset whether the ANR is on or off. As pilot in

command, you must ensure that with ANR off you can understand

critical communications. You may need to turn up the aircraft commu-

nications system volume when the headset is turned off. The aircraft

communications system volume control should be easily accessible.

Avoid setting the volume controls at levels high enough to impair your

hearing during extended periods of headset use.

Cautions and Advisories

Listening to your aircraft

With the headset’s combination of both active and passive attenuation,

typical aircraft sounds (for example, those from engines, propellers,

warning alarms, and other sound sources) may sound different to you.

We strongly recommend that, as a responsible pilot, you ensure that

you can hear and recognize these sounds when using the Bose

Aviation Headset X while operating any aircraft.

Entertainment audio sources

In addition, should you choose to listen to in-flight entertainment

through a Bose Aviation Headset X while piloting, we remind you to

limit the volume to safe levels that do not interfere with your ability to

hear informational sounds and warning alarms, such as stall warnings

or gear up.

Cautions

Protective inner screen

The protective inner screen, shown in Figure 1, is a component critical

to the headset’s ability to reduce noise. Do not attempt to remove,

replace, or repair this screen. If operating problems indicate the need

for screen replacement, contact the Bose Aviation Headset Depart-

ment. If the screen becomes wet or if foreign objects become lodged

on or adjacent to it, proceed as described in General Care and Mainte-

nance.

Earcup TriPort™ maintenance

Proper headset operation requires that the earcup TriPort openings be

kept free of debris. The TriPort openings, shown in Figure 1, are

located on the outside of each earcup and are comprised of two holes

and a screen.

Storage

Do not store the headset in an unventilated area or in direct sunlight. If

the headset is battery powered, remove the battery before storing the

headset for extended periods.

Cautions and Advisories

Water damage

Do not attempt to use or repair the headset if it has been immersed in

water. Contact the Bose

Aviation Headset Department for assistance.

See the inside back cover for address information.

Chemicals

Certain chemicals may harm the headset. Seek information about

specific chemicals from the chemical manufacturers.

Contents

Safety Information .................................................................................................. 2

Cautions and Advisories

Operational Advisory ..................................................................................... 3

Hearing Safety ............................................................................................... 3

Cautions ........................................................................................................ 4

Introduction

Headset introduction ..................................................................................... 8

Headset description ...................................................................................... 9

Common features .................................................................................. 9

Boom microphone cable variations ....................................................... 9

Boom microphone cable variation table.............................................. 10

Preparing the Bose®Aviation Headset X

Preparing the Bose Aviation Headset X for use ......................................... 11

Attaching or relocating the boom microphone cable ................................. 11

Detaching the boom microphone cable

or connector access cover .................................................................. 11

Attaching the boom microphone cable ............................................... 12

Attaching the connector access cover ................................................ 12

Warranty card ....................................................................................................... 12

Using the Bose®Aviation Headset X

Wearing the Headset................................................................................... 13

Microphone Placement ............................................................................... 14

Operating the battery powered headset ..................................................... 14

Power switch........................................................................................ 14

Control module mounting clip ............................................................. 14

Stereo/mono switch ............................................................................. 15

LED power indicator ............................................................................ 15

Volume control ..................................................................................... 16

Volume control using multiple headsets.............................................. 16

Contents

Operating the installed headset .................................................................. 17

Power switch........................................................................................ 17

Volume control ..................................................................................... 17

Volume control using multiple headsets.............................................. 18

Control module mounting clip ............................................................. 18

Aircraft panel connector ...................................................................... 18

Installing the aircraft panel connector ................................................. 19

General Care and Maintenance

Instructions for continued airworthiness..................................................... 23

Cleaning Instructions ........................................................................... 23

Replacing the ear cushion ................................................................... 25

Replacing the wind screen .................................................................. 26

Replacing the battery ........................................................................... 26

Replacing the headband cushion ........................................................ 27

Replacing the boom microphone cable or connector access cover .. 27

Troubleshooting

In case of difficulty ...................................................................................... 28

Technical Information........................................................................................... 30

FAA technical standards order ................................................................... 31

Service and warranty Information

Ordering spares and accessories ............................................................... 32

Warranty period ........................................................................................... 32

Service ......................................................................................................... 33

Headset introduction

Congratulations on purchasing the Bose

Aviation Headset X. This

headset uses advanced electronic noise reduction circuitry and

acoustical design to reduce aircraft noise. The headset reduces noise

with only slight headband clamping force, and it can be worn comfort-

ably for extended periods.

You may have a battery powered version of the Bose Aviation

Headset X, or an installed version. The illustrations in Figure 1 show

the two different headsets.

Figure 1

Headset components

battery-

powered

control

module

mounting

clip

adjustable

headband

protective

inner screen

ear cushion

flexible

microphone

boom

wind

screen

Introduction

Earcup TriPort™

openings aircraft

installed

control

module

Introduction

Headset description

The Bose

Aviation Headset X comes in several variations for both

general aviation and helicopter use. These variations are defined by the

configuration of the attaching cable and the headset’s power source.

Common features

Headsets have the following features (see Figure 1).

• Acoustic Noise Cancelling

earcups

• An adjustable headband

• Replaceable ear cushions

• A flexible microphone boom with positional adjustment

• A replaceable wind screen

• A cable with an integrated control module

• A control module mounting clip (battery powered version)

• A cable-mounted clothing clip (installed version)

• A replaceable fleece headband cushion

Boom microphone cable variations

All boom microphone cables assemble into the headset as described

in Preparing the Bose Aviation Headset X on page 11. Depending upon

the headset configuration purchased, the boom microphone cable will

be one of the types described in the Boom microphone cable variation

table on page 10.

Use Power Cable Microphone Plug Controls

Source Type

Battery Straight Electret Standard • ON/OFF switch

(9V) headphone • Volume control

and • Stereo/Mono switch

microphone • LED power indicator

Aircraft Straight Electret For aircraft • ON/OFF switch

(10-32V) panel • Volume control

connector (dual thumb wheel)

Aircraft Coiled Electret For aircraft • ON/OFF switch

(10-32V) panel • Volume control

connector (dual thumb wheel)

Battery Coiled Electret U174 • ON/OFF switch

(9V) • Volume control

• LED power indicator

Battery Coiled Dynamic U174 • ON/OFF switch

(9V) low • Volume control

impedance • LED power indicator

(10-32V) Straight Electret For aircraft • ON/OFF switch

Aircraft panel • Volume control

connector (dual thumb wheel)

Introduction

Boom microphone cable variation table

Note:

You will need to verify the type of headset connection required

by your aircraft communications panel before choosing a configuration

from the table below.

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