TOA DP-L2 Digital Ambient Noise Controller

TOA DP-L2 Digital Ambient Noise Controller Digital audio processor adjusts BGM/announcement sound volume to match changes in listening area noise levels. 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. Specification Power Source 220 – 240 V AC Power Consumption 20 W (220 mA) Frequency Response 20 Hz – 20 kHz Sampling Frequency 48 kHz Dynamic Range 108 dB (IHF-A weighted) or more Distortion 0.006 % or less Input Sensor input (Ambient noise sensor microphone input) : +4/-48 dB* changeable removable terminal block (4 pins) phantom power (+15 V DC with +15 V DC terminal Input 1 removable terminal block (3 pins) Output Monitor output: +4 dB* Output 1 A/D Converter 24 bit D/A Converter 24 bit Signal Processing Automatic Level Control Function Level meter (4 LED meters) 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) 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 Gain ratio setting: (Ambient noise: Output signal level) 6:3 Ambient noise measuring frequency setting: 20 Hz – 20 kHz Maximum Output Signal Level Control Function -12 Input Level Indicator 8 LEDs indicator Output Level Indicator 8 LEDs indicator Other Feature Phantom power switch (sensor input) Ground lift switch (INPUT 1 Operating Temperature 0 ℃ to +40 ℃ (32 ゜F to 104 ゜F) Operating Humidity 90 %RH or less (no condensation) Finish Pre-coated steel plate Dimensions 482 (W) × 44 (H) × 303 (D) mm (18.98 × 1.73″ × 11.93) Weight 3.7 kg (8.16 lb) Accessory Removable terminal plug (4 pins)…1 Power cord (2 m (6.56 ft)) …1