Digital Ambient Noise Controller

Digital Ambient Noise Controller

Digital Ambient Noise Controller

DP-L2 CU

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.

The DP-L2 is backed with TOA's five year product warranty.

UL certification


Airport Application
Video


Power Source 110 - 120 V AC, 50/60 Hz
Power Consumption 20 W (300 mA)
Frequency Response 20 - 20,000 Hz, ±1 dB
Sampling Frequency 48 kHz
Dynamic Range Over 108 dB (IHF-A weighted)
Distortion Under 0.006%, 1 kHz, +4 dB* input/output (20 - 20,000 Hz BPF)
Input Sensor input (Ambient noise sensor microphone input)
: +4/-48 dB* changeable, 10 kΩ, electronically-balanced,
removable terminal block (4 pins),
phantom power (+15 V DC, can be turned on or off with Phantom switch)
with +15 V DC terminal
Input 1,2: +4/-8/-20 dB* changeable, 15 kΩ, electronically-balanced,
removable terminal block (3 pins)
Output Monitor output: +4 dB*, 600 Ω, electronically-balanced, removable terminal block (3 pins)
Output 1,2: +4 dB*, 600 Ω, 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/-20 dB*,
Noise gate level setting: -99 to -3 dB
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 0 dB,
Minimum output signal level control: -18 to -3 dB,
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 - 20,000 Hz, 3 points
Maximum Output Signal Level Control Function -12, -6, 0, +4, +6, +12, +18, +24 dB*
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℃ to +40℃
Operating Humidity Under 90% RH (no condensation)
Finish Pre-coated steel plate, black, 30% gloss
Dimensions 482 (W) × 44 (H) × 303 (D) mm
Weight 3.7 kg
Accessory Power cord (2 m)…1, Removable terminal plug (4 pins)…1,
Removable terminal plug (3 pins)…5

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