LRF-05 Frequency filter sound level limiter-recorder0 pages

LRF-05
Frequency Sound Level Recorder-Limiter
Main Characteristics
• Frequency-Filter Sound Pressure Level limiter based on the
measurement of SPL
• It does not cut out the music.
With the ENOS (Extraneous
Noise Override System) option
the reproduction of music in
venues such as bars, pubs
and cafés is possible
• Ultra-low noise outputs, perfect for acoustic shows,
monologues, recitals, etc.
• Control by emission Sound
Pressure Level or reception
SPL (insulation)
• 50 dB correction range
(attenuation)
• Registers acoustical parameters like LAeq, LAeq1’max,
LAeq1’min, LFmax, and percentiles (interval and sessions)
• Registers all incidents: Disconnection from the mains,
sensor tampering
• Can be completely sealed
• Adaptable to any kind of regulation
• Data retrieval by USB connection with PC and modem
• Internal continuous selfverification system
• Several predictive control algorithms
D_LRF05_v0027_20120614_ENG
• Massive Data Storage for periods longer than 1 month
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 this 50 dB is 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 sound system 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
(recommended) Leq10s parameter to the most restrictive, based on Leq125
ms.
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 CESVA 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 of 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 sound levels measured in the establishment and
concerning incidents that occur, (tampering with the equipment), during a minimum period of one month, (Leq time over 6 minutes). The LRF-05 allows you
to programme the periodicity of information storage, (from 2 min. to 1 h. in 1min. steps). The information for each session is also stored, allowing you to
demonstrate the sound levels generated by your activity to the authorities. The
information stored can be retrieved directly from the LRF-05, by transferring it
to a PC via a USB port or modem. The LRF-05 works by connection to the
mains. When the LRF-05 is disconnected from the mains, it records this incident and turns off automatically, attenuating to 60 dB until the next time it is
connected to the mains. The information stored is not lost. When the unit is
connected to the mains once more, the LRF-05 continues to function as normal. A luminous remote display can be connected to the LRF-05, allowing you
to observe from anywhere in the establishment, and in real time, the sound
pressure level measured along with the attenuation level applied by the LRF05. The LRF-05 is equipped with an internal continuous self-verification system that allows you to detect and record possible tampering with both the
measurement equipment and the musical chain.