TOA | DP-L2 315H | Brochure | TOA DP-L2 315H Quick start guide

TOA DP-L2 315H Quick start guide
Digital audio processor adjusts BGM/announcement
sound volume to match changes
in listening area noise levels.
Consistently Pleasant-sounding BGM and
The TOA DP-L2 Digital Ambient Noise Controller is
the easy, automatic solution to the problem of
keeping BGM and announcements audible and
understandable when the ambient noise levels at
an airport check-in counter or boarding gate, or a
shopping mall, restaurant or pub, are higher
because a large number of people are present.
Furthermore, the DP-L2 also works to keep music
and information audio from reaching levels that
are irritating to customers and staff when the
surrounding ambient noise levels are not so high.
Automatic and Accurate Input and Output Sound
Level Adjustment
The DP-L2 is a digital audio processor with an ambient
noise control (ANC) function that makes automatic
changes in its output sound levels depending on the
amount of surrounding noise, and an automatic level
control (ALC) function that automatically adjusts the
input signal level so it is appropriate at all times.
BGM and announcements remain audible and
understandable at all times, with no annoying loudness
for customers and employees.
Output Excluded from Ambient Noise Sensing
The ambient noise sensor microphone enables
accurate measurement of BGM/announcement
listening-area noise levels.
In addition, for complete accuracy, a DP-L2 feature
exclusive to TOA automatically separates the unit’s
own output from the calculation of the ambient sound
level, instead of just mixing all sound sources together,
meaning that the output is not detected as noise.
Additionally, a monitoring feature makes it possible to
check the sound collected by the ambient noise sensor
Information for Customers and Employees.
Easy, Quick Installation and Simple Operation
The DP-L2 fits on a standard 1U size rack, so there is
no time-consuming, complex installation procedure.
All functions can be easily set from the unit’s front
panel, thanks to an LCD (liquid crystal display),
keys and knobs.
A key-lock function prevents accidental incorrect frontpanel key settings, and there are also front-mounted
LED meters for input/output signal levels, as well as
ALC and ANC levels.
System Example (When broadcasting is done via a microphone while BGM is on)
Sensor mic
(Sensor mic monitor)
* 0dB = 0.775 V
AC mains, 50/60Hz
Power Consumption
Frequency Response
20 — 20,000Hz, ±1dB
Sampling Frequency
Dynamic Range
Over 108dB (IHF-A weighted)
Under 0.006%, 1kHz, +4dB* input/output (20 — 20,000Hz BPF)
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)
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
Power Source
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
O°C to +40°C
Operating Humidity
Under 90% RH (no condensation)
Pre-coated steel plate, black, 30% gloss
482 (W) × 44 (H) × 303 D)mm
Removable terminal plug (4 pins) ×1,
Removable terminal plug (3 pins) × 5
Note: Prepare ambient noise sensor microphone separately.
Human Society with
Sound & Communication
TOA Corporation
Specifications are subject to change without notice.
Printed in Japan (0612) 833-52-335-2B u
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