Bose TriPort TTH Document technique

CLASS

RF DWG NO.

273139

REVISIONS

REV DESCRIPTION CHECK ENG DATE

01 ECN-36327:UPDATE FIGURES;

CHANGE NAME TO TTH, UPDATE

EARCUSHION SECTION

VAB AM 11/04

01A UPDATE TO INCLUDE TTH S2 AM 07/10

01B UPDATED TTHS2 TT BATT. LIFE TO 240

HRS. AM 09/10

01C UPDATED TTHS2 VOLT. RANGE AM 07/11

01D VARIOUS UPDATES AM 10/11

APPLICABLE DOCUMENTS:

DOC

LVL DRAFTER

A. MANGIAMELI DATE

02/05/04

FRAMINGHAM, MA 01701-9168

3 CHECKER

J. BROWN

02/27/04 DESCRIPTION MANUAL, OPERATING &

2 ENGINEER

A. MANGIAMELI

02/05/04 MAINTENANCE (TTH & TTH Series 2)

1 RLS TO PROD

SIZE

AFSCM

32108 CLASS

RF DWG NO.

273139 REV.

01D

SHT 1 OF 25

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

2 of 25 REV.

01D

1. HEADSET FEATURES

The Bose®TriPort® Tactical Headsets (TTH & TTH Series 2) are active noise

reduction (ANR) communication headsets intended to be used by military

passengers of wheeled combat vehicles. The TTH headsets include an earcup

assembly (earcups and napeband) and a cable/microphone assembly. The

headsets adjust to fit various heads using adjustment overhead hook and loop straps

to ensure proper fit for noise attenuation. The cable/microphone can be installed on

either the left or right earcup.

In addition to passive attenuation each earcup contains an independent ANR

system. The ANR system reduces background noise within each earcup. The talk-

thru circuit (TTC) allows for local communication when the headset is either

connected or disconnected from the vehicle. The TTC is a user-selectable feature

and is powered via a single AA size battery in the control module and utilizes the

microphones on the front of each earcup. Each earcup has an independent TTC to

allow left/right localization.

TTH TTH Series 2

Earcup Assembly

•Overhead Strap

•Napeband

•Earcups

Cable/Mic Assy

•Noise-cancelling

microphone

•Control Module

•Vehicle Interface

Connector

NOTE

The control module

design is a key

differentiator between

TTH and TTH Series 2

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

3 of 25 REV.

01D

2. TECHNICAL INFORMATION

TTH TTH Series 2

Headset can be donned and

doffed without removing

helmet.

3 3

Cable/boom microphone

assembly is replaceable and

can be positioned on left or

right side.

Mono and stereo versions

available. 33

Weight (on head) 16 oz. maximum Same

Spring force (on head) 1.8 lbf. maximum Same

Push-to-talk (PTT) on the

control module 3-position (latched / off /

momentary) toggle type

switch

3-position (latched / off /

momentary) rocker type switch

Talk-through (TTC) User-selectable, Binaural,

up to 240 hours operational

time with one AA alkaline

battery

User-selectable, Binaural,

240 hours minimum

operational time with one AA

alkaline battery

ANR Power / Current Draw 5.5 to 32 VDC / 16 to 220 mA

Fail-safe operation allows 2-

way communications with

loss of voltage input or talk-

through power.

13.5 to 32 VDC / 38 mA Peak

except during turn-on

Fail-safe operation allows 2-

way communications with loss

of voltage input or talk-through

power.

Operating noise environment Up to 95dBA SPL Same

Earphone sensitivity 106 ± 3 dB SPL for a 0 ± 0.1

dBV input Same

Input Impedance 500 ± 10 ohms Same

Boom microphone 150 ± 22.5 ohm Impedance

-70 ± 4 dB sensitivity 150 ± 22.5 ohm Impedance

-70 ± 4 dB sensitivity

Dust proof

Temperature Rating -40oC to +65oC Operating

-57oC to +71oC Storage -40oC to +65oC Operating

-57oC to +71oC Storage

EMI Qualified for fields up to 50

V/m Qualified for fields up to 50

V/m with improved

performance for reduced audio

interference with the latest IED

jamming devices and other

electronics.

Attachment Clip Cable mounted Mounted on the control

module and compatible with

MOLLE webbing. Clip is

removable and may be

attached to either side of the

control module and rotated

into three different positions.

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

4 of 25 REV.

01D

3. HEADSET CONNECTORS AND CONTROLS

The connectors and controls for the TTH and TTH Series 2 headsets are integrated

into the cable/microphone assembly normally attached to the left earcup of the

headset. The assembly may be mounted on the right earcup if desired.

The control module on the cable/microphone assembly has a three-position push-to-

talk (PTT) switch as well as a two-position talk-thru circuit (TTC) switch as shown in

Figure 2.0b and 2.0c. The PTT switch is mounted on the face of the control module

and is spring loaded to the center (disabled) position with a momentary PTT position

and latched live intercom position. The control module may also be connected to the

communications microphones typically installed on protective masks. When the

external microphone connector is connected, the control module automatically

disengages the headset boom microphone to receive signals from the external

microphone.

Framingham, MA 01701-9168 SIZE

AFSCM

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01D

Figure 2.0b TTH Control Module Features

COMPONENT FUNCTION

Microphone Boom and Cable Assembly Transmits user’s voice into intercom or radio

channel

PTT Switch Used when transmitting on and listening to intercom

channel or radio. The latched position allows the

user to communicate on the vehicle intercom.

The OFF (center position allows the user to listen

only.

The Momentary (down) position allows the user to

communicate on the vehicle intercom and the

selected radio. Please note that these function

could vary by intercom. Please consult the intercom

manual.

Vehicle Interface Connector Provides quick-disconnect for operator.

TTC Switch Used to monitor ambient noise environment when

desired.

M42 Gas Mask Microphone Connection Allows M116/G microphone in the M42 gas mask to

be plugged into the headset.

Battery Compartment Contains AA alkaline battery to power TTC.

Framingham, MA 01701-9168 SIZE

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32108 CLASS

RF DWG NO.273139 SHEET

6 of 25 REV.

01D

In addition to offering all of the same features as the TTH, the TTH Series

2 has been redesigned for better ergonomics with an integrated

attachment clip.

Figure 2.0c TTH Series 2 Control Module Features

COMPONENT FUNCTION

Microphone Boom and Cable Assembly Transmits user’s voice into intercom or radio

channel

PTT Switch Used when transmitting on and listening to intercom

channel or radio. The latched position allows the

user to communicate on the vehicle intercom.

The OFF (center position allows the user to listen

only.

The Momentary (down) position allows the user to

communicate on the vehicle intercom and the

selected radio. Please note that these function

could vary by intercom. Please consult the intercom

manual.

Vehicle Interface Connector Provides quick-disconnect for operator.

TTC Switch Used to monitor ambient noise environment when

desired.

M42 Gas Mask Microphone Connection Allows M116/G microphone in the M42 gas mask to

be plugged into the headset.

Battery Compartment Contains AA alkaline battery to power TTC.

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

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01D

Vehicle Interface Connector

Desc. Physical Appearance Connection

Pin-out

TTH Series 2 TTH

Monaural

Prior to

Pin Function

Shield

PTT

Ground

(power and audio)

Boom mic

Ground**

Left/Right earcup

audio

Boom mic

Signal**

Power

Binaural

Pin Function

Shield

Contact

Shield

Right earcup

audio

PTT

Ground

(power and audio)

Boom mic

ground**

Left earcup

audio

Boom mic

signal

Power

**Mic ground must be connected to the power/phone ground (pin 3) in the

intercom for the microphone circuit to function.

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

8 of 25 REV.

01D

4. HEADSET TROUBLESHOOTING

START

PHYSICAL DAMAGE OR

DETERIORATION PRESENT?

CAN AUDIO BE

HEARD THRU TTC?

IS FAULT STILL

PRESENT?

MICROPHONE

TRANSMISSIONS RECEIVED

BY OTHERS?

CAN AUDIO BE

RECEIVED THRU

EARCUPS?

END

CONNECT HEADSET

TO KNOWN WORKING

INTERCOM/RADIO

REPLACE TTC

BATTERY

(pg 14)

IS FAULT STILL

PRESENT?

IS FAULT STILL

PRESENT?

SUBSTITUTE CABLE /

MICROPHONE ASSEMBLY

WITH KNOWN WORKING

ONE

(pg 13)

REPLACE EARCUP

ASSEMBLY

(pg 13)

ENSURE MICROPHONE

CABLE IS FIRMLY

CONNECTED BY

CHECKING RIBBON

CONNECTORS

(pg 13)

REFER TO HEADSET

INSPECTION TABLE

REPLACE EARCUP

ASSEMBLY

(pg 13)

YES

NO NO

REPLACE BOOM

MICROPHONE

ASSEMBLY

(pg 17)

IS FAULT STILL

PRESENT?

YES

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

9 of 25 REV.

01D

Headset Inspection Table

Component Condition Corrective Measures

Earcup Assembly Check for cracks and other visible damage to the

housing. Replace earcup assembly*

Napeband Check for visible damage. Replace earcup assembly*

Earcushions Check for visible cuts. Check that uniform

pressure does not cause bottoming against

earcup.

Replace earcushions.*

Cloth Scrim in Earcup Check for tears or excessively dirty. Replace scrim*

Cables Check for cuts, kinks, or frayed area on cable. Replace cable/mic assy*

Connectors Check for dents or other physical damage;

Corrosion buildup. Replace cable/mic assy*

Battery Compartment Check for leakage, dents, corrosion buildup or

other physical damage. Replace cable/mic assy*

Boom Microphpone Check for visible damage to microphone

assembly. Replace boom microphone *

TTC Microphones Check for visible damage or blockage of the metal

screens in front of the TTC microphones on the

front of each earcup.

Replace earcup assembly*

* Refer to applicable removal and replacement procedure.

Framingham, MA 01701-9168 SIZE

AFSCM

32108 CLASS

RF DWG NO.273139 SHEET

10 of 25 REV.

01D

5. HEADSET COMPONENTS REMOVAL AND REPLACEMENT PROCEDURES

5.1 Moving Cable/Microphone Assembly to Opposite Earcup

a. Removal

1. Using cross-tipped screwdriver loosen three captive screws (3) securing

cable/microphone assembly (2) to earcup assembly (1) and the decorative cover

(5) to opposite earcup assembly (1).

2. Unplug connector connecting the cable/microphone assembly (2) to the jumper

cable coming off the earcup printed circuit board and remove the

cable/microphone assembly.

b. Replacement

1. Plug cable connector from the cable/microphone assembly (2) into the jumper

cable (4) coming off the earcup printed circuit board.

CAUTION

Ensure no wires are pinched during reassembly of the electronics cover

to the earcup assembly.

2. Using cross-tipped screwdriver, secure cable/microphone assembly (2) to the

earcup assembly (1).

3. Using cross-tipped screwdriver, secure decorative cover (5) to opposite earcup

assembly.

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