In accordance with growing environment conservation, the evaluation of environmental noise such as traffic noise or industrial equipment noise, or better understanding of the labor health environment at offices, factories, etc. are getting more important than ever before. On-site measurement of environmental noise is strongly expected to have high resolution and real-time analyzing function on the spot. 
Low frequency sound pressure level meter,Precision sound level meter TYPE 6238L displays its greatest force in these cases.
In Low frequency sound pressure level meter TYPE 6238L, replacing the card with G-card enables to measure G-weighted sound pressure level and 1/3-octave real-time analysis. This equipment is symbolizing the next-generation sound level meter with extremely high resolution and reliability.
In Precision sound level meter TYPE 6238L, the function can be extended quite easily to those such as measurement of various parameters, only by inserting option FFT Analysis Card into the card slot.

Fold-down type windscreen for wind power system measurement

This dedicated windscreen is used for wind power system noise measurement, provided with all the required performance; wind noise reduction, waterproof property and acoustic transparency.*

This outstanding performance was realized by the specified sheet device developed through the business-academia collaboration of ACO Co., Ltd., Shizuoka University and Tomoegawa Co., Ltd, which offers exceptional and non-conventional capability of water-proof and almost 100% acoustic transparency.

*This dedicated windscreen has been developed through the business-academia collaboration of Shizuoka University, Tomoegawa Co., Ltd. and Aco Co., Ltd.

All-weather low-frequency windscreen(φ175)

Newly developed material and special waterproofing technology dedicated for the windscreen guarantee easy handling, only coating the microphone.

Moreover, when fixing the microphone to a tripod, conventional microphone holder can be used without introducing special adapter as before.

Raindrops slip down along the surface without soaking into the windscreen. It took much longer on the traditional windscreen for the raindrops to dry themselves up.

Our new windscreen bounces off the water drops, which assures high precision measurement without influence of the water soaking into the windscreen.

Function Enhancement -Program card (SD card)-

Replacing the card with SD card enables to add the specified analyzing function to TYPE 6238L.

    - 1/1 and 1/3-octave Real-time analysis card

    - FTT analysis Card *option

    - RSR card (Real Sound Recording Card) *option

G-weighted sound pressure level (TYPE 6238L)

Replacing the card with G-card enables to measure G-weighted sound pressure level and 1/3-octave real-time analysis.

Frequency characteristics of microphone

TYPE 7146NL is the field type electret condenser microphone which complies with IEC651 TYPE1.

It has also wide dynamic range and frequency range, as well as high sensitivity.

It is easy to operate, free from need of supplying DC bias voltage.

Ultralow-frequency sound level analysis

Ultralow-frequency sound level (1Hz～) can be analyzed by using Low frequency sound pressure level meter TYPE 6238L, Sound card TYPE 8833A, and FFT analyzer 'SpectraPLUS Pro'.

Simultaneous display and analysis for different frequencies are available by using the optional function(scaling/calibration extension) of NA-0038L(SpectraPLUS pro).

Analysis of acquired real-time wave data is possible by using RSR card.