The DL series aircraft noise monitoring products are the culmination of our experiences and technologies gained in acoustic measurement fields, knowledge of hardware and know-how about software. We offer various types of products from a permanent monitoring station to a mobile noise monitoring station. And we can customize them according to the needs of a user and the actual measurement fieldfs condition. Since the DL series have earned the endorsement by many users, the permanent type of aircraft noise monitoring station has been installed in more than 170 sites in Japan.
'Permanent noise monitoring station DL-100/R' has been installed and is operating around many major airports in Japan. According to field conditions or user needs, it can include aircraft noise discriminating equipment, actual sound recorder, meteorological sensor, public information function, and so on.
'Mobile noise monitoring station DL-100/PT' has been developed mainly for short-term measurement, emphasizing portability and usability. It enables a user to set it up easily and quickly in the field. In spite of its compactness, it realizes precise automated measurement in combination with the aircraft noise discriminating equipment.
'How well we can discriminate the aircraft noise.' This is the most important thing for unattended aircraft noise measurement. The aircraft noise discriminator we suggest has high discrimination ability and has operated around civil airports like Narita, Haneda and Kansai, as well as around military airports like Yokota, Atsugi, Kadena and Futenma. It can be equipped with either a permanent or a mobile noise monitoring station.
Our aircraft monitoring station operates from AC-line, external DC-12V or battery-operated. In case of a power failure continues beyond the length of the battery backup time, it can start up and will continue to monitor automatically by reading out the configuration values after the power recovery, as well as it recharges the weak battery at the same time. Moreover, it has multiple storage devices such as a hard disk, a silicon disk, memory disk, etc. and does parallel recording to secure important measurement data just in case. In addition, an online station has a function to automatically report the abnormal information to our maintenance center.
Since the system is manipulated by the interactive touch panel display, anyone can handle it easily. All the operations including setting up the measurement condition, reading the data and copying to a memory card can be manipulated by this touch panel display.
We have designed the system to be flexible to change or modify its hardware and software in the future. For example, it can be equipped with a meteorological meter, a low-frequency sound level meter, a vibration meter, a seismometer and a dust sampler. Moreover, we offer various options to correspond to user needs, such as building a simple online system using modems, dial up routers and mobile phones or a real time online system using IP-VPN, as well as the function to correct the time precisely using a radio clock. We are able to support a variety of measurements for environmental noise, or automotive noise and vibration by just switching the software program.
| Sound level meter system | Weatherproof windscreen, Microphone stand, Certificated sound level meter, Extension cord for a microphone |
|---|---|
| Data recording system | Central processing unit, Liquid-crystal touch display, Storage devices (Hard disk drive, Silicon disk drive, Memory card)
|
| Aircraft Noise Discriminator Type-I (Optional) |
Discrimination sensor Type-I, Discrimination circuit, Filter&Amplifier, Sensor extension cord, Attachment base |
| Aircraft Noise Discriminator Type-II (Optional) |
Discriminator sensor Type-II, Discriminator circuit, Sensor extension cord, Attachment base |
| Actual sound recording unit
(Optional) |
Sampling frequency: 11KHz or 22KHz or 44KHz
Quantization bit rate: 8bit or 16bit Channel number: 1 or 2 |
| Power supply system | Uninterruptible power source system (Mobile station:90min, Permanent station:8hrs) Three way power source (AC-Line, DC12V, Battery) |
| Cabinet-Rack
(Permanent noise monitoring station) |
Acrylic translucent door, Key, Dustproof filter
Dimensions: 570mm(W) x 630mm(D) x 1230mm(H) Gross weight: 110k (including the main body of the measurement equipment) |
|
Mobile case
(Mobile noise monitoring station) |
Enhanced resin, vertical/horizontal placement
Dimensions:550mm(W) x 565mm(D) x 340mm(H) Gross weight:20kg (including the main body of the measurement equipment) |
| System Software | Maintenance (for administration) program
|
|---|---|
| Measurement (function) Software | Aircraft Noise Measurement Aircraft noise discrimination (Option) Actual sound recorder (Option) Environmental noise measurement Response to a power failure |
| Function of online communication
(Option) |
Function of online maintenance
Function of online data sending |
| Function of automated time correction using radio clock
(Option) |
|
| Actual sound recording function
(Option) |