Shure Incorporat ed
222 Hartrey Avenue
Evanston IL 60202-3696 U.S .A.
Model P4T Transmitter User’s Guide
P4T Transmitter
1999, Shure Incorporated
27A8712 (SC)
Printed in U.S.A.
WARNING!
USING THIS SYSTEM AT EXCESSIVE VOLUMES CAN CAUSE PERMANENT HEARING DAMAGE.
USE AS LOW A VOLUME AS POSSIBLE.
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
120 dB SPL — avoid or damage may occur
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 earpieces 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 ear molds with an antiseptic before and after use to avoid infections. Stop using the earphones if they are
causing great discomfort or infection.
This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit.
This symbol indicates that there are important operating and maintenance instructions in the literature accompanying
this unit.
FCC Statement. The P4R Receiver complies with part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device does not cause harmful interference,
and (2) this device must accept any interference received, including interference that may
cause undesired operation.
Licensing Statement. A user license may be required for operation. Contact the communications authority in your country for more information.
Modifications to Approved Equipment. Changes or modifications not expres sly approved by Shure Brothers Incorporated could affect compliance with telecommunications
standards, thereby voiding the user’s authority to operate this product.
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