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SPL2(TS) and SPL3(TS) user manual
EN
Introduction
The SPL2, SPL2TS, SPL3 and SPL3TS are sound pressure limiters (SPL), especially designed
for use in public houses, discotheques, etc. The SPL-limiters are no peak-limiters, they only limit
the average sound pressure. Trimmers for on-site calibration are positioned behind removable
cover(plates) which can be put under seal.
The four different Dateq SPL-limiters form one family. The SPL2 and SPL2TS function without a
microphone, the SPL3 and SPL3TS use a special measuring microphone. The SPL2TS and
SPL3TS are supplied with a timer, able of setting the maximum sound level for certain periods of
the day (see table 1). Basically, all four types are identical. This manual covers all different types.
Directions for one specific type, are indicated with a logo in the left margin.
measuring microphone
timer
Table 1 : individual functions limiter types
Measuring microphone (advantages and disadvantages)
In some cases, authorities dictate the use of a measuring microphone. Also when using the limiter
with live-music, a measuring microphone will be essential. Using a measuring microphone can
have advantages and disadvantages.
Calibrating the limiter usually takes place during the day, in an empty room. When this room
fills with a crowd during the night, acoustical damping will occur, so the maximum sound level
will be lower than the level set earlier. When making use of a microphone, the limiter will
compensate for this difference.
Using a measuring microphone can be a disadvantage in smaller rooms, with relatively low
maximum sound levels (less than 100 dBA). In these situations, the crowd can easily drown
SPL 2
SPL 2 TS
SPL 3
SPL 3 TS
Introduction
3
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