4
Thank you for purchasing the Protect Basic 31 earmuffs. In order to enjoy the use of this product at its maxi-
mum, please read the following hints and notes for use we compiled for you.
In order to avoid hearing disorder please note the following safety hints:
SAFETY HINTS
1. Place the earmuffs firmly around your auricles. For best wearing comfort, adjust the headband to the size of your
head.
2. Permanently wear the headband earmuff in noisy environment.
3. The earmuff should be regularly checked for serviceability. Earmuffs, and in particular the cushions, may
deteriorate with use and should be examined at frequent intervals for cracking and deterioration. Should the ear
muffs start to show cracks, do not use them anymore. After some years of use, the evidence of cracks is a sign of
material fatigue, which is considered a natural wear out.
4. The use of hygiene covers over the cushions, may affect the acoustic performance of earmuffs.
CHARACTERISTICS/TECHNICAl SPECIFICATIoNS
• SNR 22 dB (Single Number Rating) / NRR 31 dB (Noise Reduction Rating)
• Ultra lightweight: 184 grams
• Folds compactly for transportation in a pocket: 10 x 9,5 cm
• Soft ear pads
CHART oF ATTENUATIoN VAlUES FoR HEARING PRoTECTIoN PRoTECT BASIC 31
Attenuation Values: H = 30 dB, M = 19 dB, L = 12 dB, SNR = 22 dB
GB
INSTRUCTIoN mANUAl
DöRR Protect Basic 31 Hearing Protection
Frequency (Hz)
63
125
250
500
1000
2000
4000
8000
mean Attenuation (dB)
13.5
11.2
12.8
19.9
27.6
34.1
41.6
37.3
Standard Deviation (dB)
5.6
4.3
3.9
3.6
3.8
2.4
3.2
4.5
APV
assumed protection value
(dB)
7.9
6.9
9.0
16.2
23.8
31.7
38.4
32.7
