LA-7700 High-Function Precision Sound Level Meter, Class 1
For measuring machine noise, we have added the "LA-7700 High-Function Precision Sound Level Meter (Class 1)" to our lineup of high-sensitivity models, building upon the "LA-7000 Series High-Function Sound Level Meter (Sound Level Meter)," which allows measurement, analysis, and recording while listening to the machine's operating sound. This makes it possible to measure minute sounds that were previously difficult to measure, such as the faint but irritating noises of home appliances that require energy saving and noise reduction, or the slight noises of automobiles.
Furthermore, the LA-7000 series offers a wide range of optional features (including recording/offline analysis functions, RTA analysis functions, FFT analysis functions, level simulator functions, and sound quality evaluation functions), enabling more advanced analysis of minute sounds in the measurement field.
Features
- By employing a microphone with a self-noise level of less than 10 dB, we have achieved a lower measurement limit of 20 dBA.
- The large color LCD touch panel allows for easy and intuitive operation to start measurements.
- This single device can perform noise measurement, sound recording, frequency analysis, and sound source detection for unusual noises.
- The offline analysis function (LA-0704) allows for recalculation and re-analysis of recorded data.
- Supports a wide range of optional features.
Supported modes: SLM-Single, Dual, Quad, Filter1/1, RTA1/1, Filter1/3 (LA-0702), RTA1/3 (LA-0702), FFT (LA-0703), LSIM (LA-0707), SQE Steady-state sound (LA-0708A)
Main specifications
| Measurement Law Type Approval Number | No. TF191 |
| Applicable standards | JIS C 1509-1:2017 Class 1 JIS C 1516:2014 Class 1 IEC 61672-1:2013 Class 1 ANSI S1.4-2014/Part 1 Class 1 |
| Measurement frequency range | 10 Hz～20 kHz |
| Measurement range (JIS, IEC) A: 20–128 dB C: 28–128 dB Z: 34–128 dB |
Self-noise level A: 12 dB or less C: 20 dB or less Z: 26 dB or less |
LA-0709 Infrasound measurement function
We have added the "LA-0709 Infrared Sound Measurement Function" option to the "LA-7500 Sound Level Meter Class 1" lineup.
Continuously operating equipment such as household fuel cells, water heaters, refrigerators, ventilation fans, and air conditioner compressors, as well as environmental noise from cars, trains, airplanes, and wind power generation, can be sources of infrasound (1-20 Hz). Infrasound is said to cause psychological pressure and lead to health problems, making the measurement of infrasound important in noise control measures, in addition to measuring noise levels. This function makes it possible to measure infrasound that was previously impossible to measure and is inaudible to the human ear.
Features
- By adding the LA-0709 ultra-low frequency sound measurement function option, a single unit can measure a wide bandwidth starting from 1 Hz.
*This product can only be installed on the LA-7500. Also, if you wish to install it on an LA-7500 that you have already purchased, we will arrange for pickup. - Supports a wide range of optional features.
Supported modes: SLM-Single, Dual, Quad, Filter1/1, RTA1/1, Filter1/3 (LA-0702), RTA1/3 (LA-0702), FFT (LA-0703)
Main specifications
| Measurement frequency range | 1 Hz to 20 kHz (By switching the measurement mode, measurement is possible between 10 Hz and 20 kHz or 1 Hz and 20 kHz.) |
| Frequency weighting characteristics | G-type characteristics can be selected. |
| Time-weighted properties | 10 seconds selectable |
