General Description - CESVA LRF-05 Manual Del Usuario

1. GENERAL DESCRIPTION

The LRF-05 frequency sound level recorder-limiter measures, records and controls the
sound pressure level in the establishment where it is installed. The LRF-05 is inserted into
the reproduction chain, between the mixing desk and the crossover, intervening in the entire
sound chain. The LRF-05 automatically corrects excesses in the musical signal level of up to
50 dB. If these 50 dB are exceeded, the LRF-05 penalises with a 60 dB attenuation during a
programmable time interval. The wide dynamic attenuation range provides the user of the hi-
fi set with considerable room for manoeuvre in which the LRF-05 corrects the signal level
excesses without restrictive attenuations. The LRF-05 is equipped with different predictive
reply algorithms for this function, ranging from the most stable, based on the Leq
parameter to the most restrictive, based on Leq
The LRF-05 includes the ENOS (Extraneous Noise Override System) option, specially
designed for music reproduction in venues with a high level of ambient noise: bars, pubs etc.
It does not cut out the music. In addition, the LRF-05 has ultra-low noise outputs, perfect for
acoustic shows, monologues, recitals, etc.
The LRF-05 functions according to the sound levels measured in the establishment by
means of a sensor designed on the basis of the latest technology developed by
in the field of sound measurement and/or according to the sound pressure levels in the
dwelling next door to the establishment, calculated on the basis of the levels measured by
the sensor by octave bands (centred on 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2
kHz, 4 kHz and 8 kHz) and to the existing insulation levels by octave bands between the
establishment and the dwelling. This spectral function allows the user to obtain the maximum
sound pressure level in the establishment without exceeding the permitted sound level limit
in adjacent buildings. The LRF-05 is also equipped with a recording function that allows the
user to store information concerning measured sound levels in the establishment and
concerning incidents that occur (tampering with the equipment) during a minimum period of
one month (Leq time over 6 minutes, see section 4.9). The LRF-05 allows you to programme
the periodicity of information storage (from 2 min. To 1 h. In 1-min. steps). The information
for each session is also stored, allowing you to demonstrate the sound levels generated by
your activity to the authorities. The stored information may be retrieved directly from the LRF-
05, by transferring it to a PC via a USB port or modem.
The LRF-05 allows the user to programme diurnal and nocturnal evaluation time zones and
the maximum levels permitted for each of the zones. These zones correspond to those
stipulated in the regulations applicable to each establishment (see example below). You may
also introduce the time when the establishment is open (session schedule) into the LRF-05,
a different one for each day of the week and adaptable to any kind of establishment. From
within the session schedule (the shaded area in the example) the LRF-05 selects the
maximum permitted level according to the time zone (day or night). Outside the session
schedule the LRF-05 attenuates 60 dB, thus preventing music from being played.
Monday Tuesday Wednes. Thursday
DAY
NIGHT
.
125 ms
SESSION TIMETABLE
Friday
22
Saturday Sunday
08'00 h
22'00 h
07'59 h
10s