Bose Acoustic Wave music system II. Owner's Manual - Page 3

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This headset meets or exceeds all requirements of EN352-4, 1996

(European Standard-Hearing Protectors-Safety Requirements and

Testing-Part 4: Level-Dependent Ear Muffs).

• The wearer should ensure that:

The ear muffs are fitted, adjusted, and maintained in

accordance with the manufacturer's instructions.

ii.

The ear muffs are worn at all times in noisy surroundings.

iii.

The ear muffs are regularly inspected for serviceability.

WARNING: If the above recommendations are not adhered to, the

protection afforded by the ear muffs will be severely impaired.

• This product may be adversely affected by certain chemical sub-

stances. Further information can be sought from the manufacturer.

• Ear muffs, and in particular cushions, may deteriorate with use and

should be examined at frequent intervals for cracking and punc-

tures, for example.

EN352-4 also calls for HML Criterion Levels and other data to be

provided to describe the hearing protection performance of level-

dependent devices. At present, no standard has been drafted or

accepted defining how to measure the hearing protection provided by

active noise cancelling headphones. In the absence of an accepted

method, Bose

Corporation has had the product's attenuation mea-

sured by an accredited U.S. testing laboratory using a combination of

real head methods. Based on this information, the Bose Aviation

Headset Series II provides sufficient hearing protection in any noise up

to 108 dB(A) in sound pressure level. For more information on the

methods used and the results obtained, please contact the Bose

Aviation Headset Service Department (page 23).

This headset complies with RTCA/DO-214 Audio Systems Characteris-

tics and Minimum Operational Performance Standards for Aircraft

Audio Systems and Equipment:

• Transient RF Susceptibility per RTCA/DO-214 ¶ 2.5.11.1 and RTCA/

DO-160C ¶ 20.0, Category T.

• Sustained RF Susceptibility per RTCA/DO-214 ¶ 2.5.11.2 and

RTCA/DO-160C ¶ 20.0, Category T.

Operational Advisories