Справочник Пользователя для Shure P4R

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This symbol indicates that there are important operating and maintenance instructions in the literature 
accompanying this unit.

In order to use this system safely, avoid prolonged listening at excessive sound pressure levels.  Please 
use the following guidelines established by the Occupational Safety Health Administration (OSHA) on 
maximum time exposure to sound pressure levels before hearing damage occurs.

90 dB SPL at 8 hours
95 dB SPL at 4 hours
100 dB SPL at 2 hours
105 dB SPL at 1 hour

110 dB SPL  at 

1

/

2

 hour

115 dB SPL at 15 minutes

It is difficult to measure the exact Sound Pressure Levels (SPL) present at the eardrum in live applications.  
In addition to the volume setting on the PSM, the SPL in the ear is affected by ambient sound from floor 
wedges or other devices.  The isolation provided by the fit of quality earphones is also an important factor 
in determining the SPL in the ear.

Here are some general tips to follow in the use of this product to protect your ears 
from damage:

1.

Turn up the volume control only far enough to hear properly.

2.

Ringing in the ears may indicate that the gain levels are too high.  Try lowering the 
gain levels.

3.

Have your ears checked by an audiologist on a regular basis.  If you experience wax buildup in your 
ears, stop using the system until an audiologist has examined your ears.

4.

Wipe the earphones with an antiseptic before and after use to avoid infections. Stop using the ear-
phones if they are causing great discomfort or infection.