Sennheiser ActiveGard SH 300 Manuel utilisateur

SH 300

User

Manual

www.senncom.com

ActiveGard™ is an active system, which automatically compresses an incoming sound

that is too loud. As opposed to cutting the volume signal off, it actually compresses the

incoming signal to a safe level without distorting it. It also reacts in just a few milliseconds,

which is much faster than the human ear can even recognize.

Traditional systems work by simply clipping high-volume peaks. This, in turn, can

create severe, increasing, and uncomfortable distortion during a phone call. Since the

potentially dangerous energy of the volume signal is only reduced and not removed,

the headset speakers are still likely to transmit a very high, unpleasant, and maybe

even unsafe sound level.

Compression

Dialing Talking

Acoustic burst

Dialing Talking

Acoustic burst

Traditional

systems:

ActiveGard™

Peak-clipping

Traditional

systems: Peak-clipping



www.senncom.com

SH 300

User

Manual

Technical data

Transmission data

Microphone ...............................................Noise Canceling

Frequency response ................................100 Hz – 3400 Hz

Sensitivity .................................................-34 dB

Distortion ..................................................Less than 1%

Receiving data

Impedance.................................................300 Ω

Frequency response ................................300 Hz – 3400 Hz

Sound pressure max ...............................104 dB SPL limited by ActiveGard™

Distortion ..................................................Less than 1%

Weight of headset...................................29 g / 0.67 oz

Wearing style ...........................................Over-the-ear (left or right ear)

Personal ﬁt................................................3 adjustment speaker rings

Cable length..............................................1 m / 3.3 ft Kevlar®reinforced

Connector ..................................................Easy Disconnect

Ear-cap size...............................................Regular ø 20 mm / 0.78 inch

Accessories included

Carry bag, headset storage hook, clothing clip and microphone windscreen.

Safety instructions

· Avoid listening at high volume levels for long periods since this leads to permanent hearing defects.

· Keep children away from the SH 300. When playing, children can be strangled by the cables.

· Do not use the SH 300 in a damp or dusty environment.

SH 300_User manual.indd 1 09/05/07 11:04:52

2 cm

1Operating elements

A. Microphone boom arm

B. Hinged speaker

C. Ear-cap adapters

2Adapting the headset to your ear

A. Hinge the speaker to open position.

B. You can wear the same headset on both left and

right ear.

C. Hinge the speaker so that it ﬁts into your ear.

For the best wearing comfort, allow the speaker to

open a bit. Turn the microphone boom towards your

mouth. The optimal microphone position is two cm

from the corner of the mouth.

3To connect the headset to the “Easy Disconnect” faci-

lity, plug in one half of the “Easy Disconnect” facility

into the other half until it locks into place. An audible

“click” should be heard.

4To disconnect the headset from the “Easy Disconnect”

facility, press one of the two release buttons (A).

The two halves of the “Easy Disconnect” facility auto-

matically disconnect.

5If the pre-assembled medium size ear-cap adapter

does not ﬁt your ear, exchange the ear-cap adapter for

a larger or smaller one.

6The windscreen effectively reduces wind noise.

Slide the windscreen over the microphone.

The windscreen must totally enclose the microphone.

7 In order to always have the headset at hand, fasten

the supplied headset holder to your computer screen.

8 Afﬁx the headset cable to the clothing by means of the

supplied cable clip. Attach the cable clip so that you

can freely move your head.

3 4

7 8

B C

NB: Deutsch, Français, Italiano, Español, Português, Nederlands, Dansk, Svenska, Norsk is available from www.senncom.com

SH 300_User manual.indd 2 09/05/07 11:04:54

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