|
TOA Electronics DP-L2 Digital Ambient Noise Controller,
4-LED metering automatically adjusts output gain to match changes in ambient
noise levels, Monitor output for sound picked up by the ambient noise sensor
microphone, Automatic level control feature with 4-LED metering maintains input
signal at a constant level by adjusting input signals to appropriate levels when
the sound level is too low, Sound volume is controlled without losing nuances of
speech or compromising background music sound quality, Maximum Output function
acts as a limiter, Sensor input reference level fine adjustment function, Sensor
input phantom power, 8-LED input and output level metering, Auto input
sensitivity setting and sensor input reference level measurement function.
|
General Information |
|
Manufacturer |
TOA Electronics |
|
Manufacturer Part Number |
DP-L2 |
|
Product Name |
Digital Ambient Noise Controller |
|
Overview |
The TOA DP-L2 Digital Ambient Noise
Controller is a rack-mountable digital audio processor that
automatically adjusts output volume in response to changing ambient
noise levels. Typical applications include airports, shopping malls and
restaurants.
Conventional ambient noise controllers simply add the output to the
ambient noise, making manual compensation adjustments necessary. The
DP-L2 features a superior automatic level control (ALC) algorithm that
automatically adjusts the input signal to maintain a level suitable for
the surrounding ambient noise level, ensuring an appropriate input
signal level at all times.
The DP-L2 has two balanced Line Inputs and Outputs, one Ambient Noise
Sensor Microphone Input and one Monitor Output . A range of microphones
may be used for detecting ambient noise, including ceiling
flush-mounted, dynamic and condenser types. Front panel LCD and controls
allow easy adjustment of all functions with input, output, ALC and ANC
level metering. A key-lock protect function prevents accidental changes
in front-panel settings. |
|
Features |
- Digital ambient noise control
(ANC) function with 4-LED metering automatically adjusts output gain
to match changes in ambient noise levels.
- Exclusive TOA algorithm
distinguishes unit output sound level from ambient noise levels, for
more accurate control.
- Monitor output for sound picked up
by the ambient noise sensor microphone.
- Automatic level control feature
with 4-LED metering maintains input signal at a constant level by
adjusting input signals to appropriate levels when the sound level
is too low.
- Sound volume is controlled without
losing nuances of speech or compromising background music sound
quality. This prevents unnatural sound effects that often results
when using conventional Automatic Gain Control (AGC) or compressor.
- Maximum Output function acts as a
limiter.
- Sensor input reference level fine
adjustment function.
- Sensor input phantom power.
- 8-LED input and output level
metering.
- Auto input sensitivity setting and
sensor input reference level measurement function.
- Front panel LCD screen, keys and
knobs ensuring easy access to all settings.
- Built-in key lock function
prevents unauthorized adjustment.
- Standard 1U-size (44.5mm/19-inch)
with rack-mount hardware included.
|
|
Specifications |
|
Power Source |
AC mains, 50/60Hz |
|
Power Consumption |
20W |
|
Frequency Response |
48kHz |
|
Sampling Frequency |
20 — 20,000Hz, ±1dB |
|
Dynamic Range |
Over 108dB (IHF-A weighted) |
|
Distortion |
Under 0.006%, 1kHz, +4dB* input/output (20
— 20,000Hz BPF) |
|
Input |
Sensor input (Ambient noise sensor
microphone input):
+4/–48dB* changeable, 10kΩ, electronically-balanced, removable terminal
block (4 pins),
phantom power (+15V DC, can be turned on or off with Phantom switch)
with +15V DC terminal
Input 1, 2: +4/–8/–20dB* changeable, 15kΩ, electronically-balanced,
removable terminal block (3 pins) |
|
Output |
Monitor output:+4dB*, 600Ω,
electronically-balanced, removable terminal block (3 pins)
Output 1, 2: +4dB*, 600Ω, electronically-balanced, removable terminal
block (3 pins) |
|
A/D Converter |
24 bit |
|
D/A Converter |
24 bit |
|
Signal Processing |
Automatic Level Control Function |
Level meter (4 LED meters), Automatic
input signal level control function.
Automatic input sensitivity setting function: +4/–8/–20dB*,
Noise gate level setting: –99 to –3dB |
|
Ambient Noise Control Function |
Level meter (4 LED meters). BGM/Announce
level control function,
Automatic sensor input reference level measuring function,
Sensor input reference level fine adjustment function,
Maximum output signal level control: –15 to 0dB,
Minimum output signal level control: –18 to –3dB,
Sample time setting: 10 s, 20 s, 30 s, 1 min, 5 min
Gain ratio setting (Ambient noise; Output signal level) 6: 3, 5: 3, 4:
3, 3: 3, 3: 4, 3: 5, 3:6,
Ambient noise measuring frequency setting: 20 — 20,000Hz, 3 points |
|
Maximum Output Signal Level Control
Function |
–12, –6, 0, +4, +6, +12, +18, +24dB |
|
Input Level Indicator |
8 LEDs indicator |
|
Output Level Indicator |
8 LEDs indicator |
|
Other Feature |
Phantom power switch (sensor input), Key
lock function,
Ground lift switch (INPUT 1, INPUT 2), Input/Output bypass function in
power off |
|
Operating Temperature |
0°C to +40°C |
|
Operating Humidity |
Under 90% RH (no condensation) |
|
Finish |
Pre-coated steel plate, black, 30% gloss |
|
Dimensions |
482 (W) × 44 (H) × 303 D)mm |
|
Weight |
3.7kg |
|
Accessory |
Power cord (2m) × 1,
Removable terminal plug (4 pins) ×1,
Removable terminal plug (3 pins) × 5 |
A-20120518-1250-130-L
M-20180504-1250-231-L
*This item is BRAND NEW -
not refurbished. It comes with all manufacturer supplied accessories, and full
manufacturer's USA warranty.
|
