Noise Limiters / Noise Pollution Control Systems
Noise limiters, also known as environmental noise control systems, noise pollution
control system or just plain sound limiters, are now a prerequisite in many parts of the
UK for the granting or renewal of an entertainment licence.
Most local authorities and environmental health officers require the installation of an
electronic noise limiter in village halls, pubs, bars, clubs, restaurants, health clubs and
other entertainment venues to minimise complaints regarding noise pollution.
Lime Technologies (noiselimiters.co.uk) are specialists in the noise
control field. We supply and / or install noise limiters and our technical
department will be pleased to offer you free advice on the appropriate type of
unit for your particular venue. If required we can carry out the installation
for you. Prices start from around £550 + VAT for a fully installed system, please contact our sales department for a quotation on any noise control equipment.
Quantity discounts are available - please call or email for pricing if
purchasing more than one unit.
PLEASE NOTE:
Recent legislation provides that as from 1 October
2006, local authorities will be able to issue fixed penalty notices in the
region of £500 to the person in charge of the premises at the time of any noise
complaint. This could be the license holder, manager or any other employee.
This is in addition to their existing
powers to serve noise abatement notices and review premises licenses.
|
Noise Limiter kits |
|
DIY Noise Limiter Kit £529.00 GBP
(including VAT)
DIY noise limiter kit.
Save over £100 by fitting your own sound limiter. Full kit includes
Lime SL2000 sound limiter (see below for details), isolating switch, metal 2 gang switched socket
outlet, 5m 6mm twin & earth power cable, 50m microphone cable, 50m multicore
cable for remote level indicator, sound pressure level meter and full
instructions. (Always consult a competent
electrician if you are unsure about electrical wiring. Typical cost
£120+VAT)
 |
|
|
|
|
 |
Plug and Play Noise Limiter
£529.00 GBP
(including VAT)
Plug and play noise limiter. Approved by
many Environmental Health Departments. No professional installation
required. Simple DIY fitting or use as a portable unit. Ideal for
marquees.
Supplied complete with sound pressure level meter and full instructions.
Also comes complete with locking socket covers to prevent bypassing.
|
|
|
|
Lime Technologies supply two distinct types of
noise limiter.
1.
Sanction Noise Limiter (Electronic sound monitoring and mains power
switching unit)
This type of noise limiter monitors sound levels within the venue using a built in or external microphone.
If the preset sound pressure level, usually set by the local environmental health
officer, is exceeded for a certain period of time (normally 10 seconds) the mains power is
disconnected from the sound equipment for around 10 seconds and then
automatically restored. This type of sound limiter can be used
in almost any situation but is the only viable solution when bands or mobile DJs
bring
their own equipment to your premises. If you own or manage a pub, bar, village hall or
other establishment where live music is played you can safeguard your licence
and avoid the possibility of large fines by ensuring that musicians plug their
equipment into a power socket controlled by a device of this type. This
type of sound limiter will usually need to be fitted by a professional installer
as mains voltage connections are involved.
Lime Technologies supply and install several different models
of limiter, some are shown below.
Lime SL2000
-
BEST SELLING SOUND LIMITER!
Designed by installers for straightforward installation and maximum
functionality this noise limiter has been fitted in thousands of venues
throughout the UK, The SL2000 noise limiter offers all the features of more
expensive systems and is local authority approved. It features fully
automatic operation, remote level indicator and remote sound pickup microphone,
built in 30 Amp switching
contactor and fire alarm interface. Easily fitted by any competent electrician. In our opinion this unit offers the
best value.
Download SL2000 Installation Manual
£400.00 GBP including VAT
|
 |
|
|
Formula Sound Sentry
The Sentry works in conjunction with a relay or
contactor (available separately £115.00 GBP including VAT) and usually controls mains power. But the Sentry is not limited to
this function; any function that can be controlled by a relay or switch can
be controlled by the Sentry.
The Sentry has connectors provided to interface with a range of equipment,
plus internally selectable options to make the system as versatile as
possible. Although its main application is to control mains power outlets in
entertainment venues it is not restricted to this application. Basically any
function that can be controlled by a relay or switch can be controlled by
the Sentry. These may include disconnecting loudspeakers, switching passive
attenuators to reduce system volume or acting as the trigger into an active
attenuator system. It is microphone driven and has its own microphone built
in to minimise tampering.
The Sentry also incorporates the facility to operate at two different sound
level thresholds which may be selected manually, by a remote key switch or
similar, or automatically by a time switch (switches not supplied). This
allows a venue to operate at different levels at different periods of the
day. e.g. when near offices or shops. An integral timer is available as a
cost option.
Download Sentry Instruction Manual£559.00 GBP including VAT
|
 |
|
|
|
|
Castle GA904 Electronic Orange
The Castletech Electronic Orange Noise Controller is connected to the main power supply for the amplification equipment, the Electronic Orange flashes a warning when pre set sound levels are exceeded. If the operator doesn't turn down the sound within a pre-set time, an automatic cut off activates. The music never has to stop, because a warning light flashes if the limit is exceeded, and only when this is ignored does the power supply cut off to prevent further abuse.
£672.00 GBP including VAT
Download GA904 Instruction Manual
|
 |
|
|
|
|
2. Electronic sound level attenuation system
A unit which is connected between the mixer or sound source, a karaoke
machine or CD player for example, and the main power amplifier. The unit
continually monitors the sound level and reduces the volume if a preset limit is
exceeded. This type of noise control system is only suitable if the sound
system or at least the power amplifier is permanently installed in the venue.
An example of this type of unit is the AVVC below.
SPL2120
The SPL2120 front panel features an integral security lock to ensure that
adjustments to maximum volume levels are implemented by key holders only. In
‘unlocked’ mode two front panel pre-sets are exposed and available for
adjustment. The first calibrates the 16 segment Left/Right bargraphs to the
incoming audio and dictates the point at which ‘protection’ processing
commences. The second sets the absolute volume level to which the sound
system is allowed to perform. If the SP2120 receives increased signal
levels, the transparent ‘protection’ circuitry is activated which maintains
the specified system volume level without degradation in sound quality.
Step 1: Insert key to ‘unlock’ front panel and adjust VU meter pre-set until
the peaks of the incoming audio illuminate the red endstop 0dB LEDs.
Step 2: Adjust max output level pre-set until sound system volume reaches
the maximum permitted SPL as specified by the installer, client or
environmental Health Officer and remove key.
Installed in only a few minutes this unit completely eliminates the
possibility of ‘unauthorised’ volume levels. No sound quality loss even
during heavy protection processing. Housed in a 1U 19" rack mounting case.
Isolation transformer output option. |
SPL2120 |
|
 |
|
£339.00 GBP including VAT
|
AVC2
The AVC2 performs as an
intelligent volume control and in operation is very simple. If the average
operating level is kept below the internally set threshold, the AVC2 has no
effect. If the average programme level exceeds the threshold the unit will
reduce its output level. The level is reduced in discreet steps indicated by
the led. bar graph meter on the front panel of the unit. The action of the AVC2 is to fade between these steps and is almost undetectable in use. The
more one tries to increase the volume, the more the AVC2 will decrease it so
that the system will barely change in perceived level. If driven to maximum
attenuation, the output level will be reduced by more than the increase in
input level. The mixer or pre amp will probably be
clipping, but the system will actually be at a lower than normal level. A
clip indicator is provided to show when the input stage of the limiter is being
over driven. Reducing the input level will gently release the attenuation
provided by the AVVC.
|
AVC2 |
 |
|
£545.00 GBP
including VAT
|
|
|
|
Lime Technologies - The Noise Limiter Specialists