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TAKUWA CORPORATION

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What is a groundwater aeration sound measuring device

Equipment configuration

[Overview]
This device consists of (1) a pickup sensor, (2) a measurement recording unit, and (3) a headphone (Photo 1).
The groundwater aeration sound captured by the pickup sensor is processed by the measurement recording unit, and the intensity of the sound can be judged audibly and visually by means of the headphone or a level meter.
The device calculates and displays a typical value of the intensity of groundwater aeration sound at the point of measurement, and at the same time this typical value can be stored in internal memory.
The typical value thus stored can be output to a personal computer by means of RS-232C signals after completion of the measurement, and can be checked by using spreadsheet calculation software, etc. (Fig. 1)

The original sound thus measured includes the external noises such as the sound of groundwater flowing, sound of the wind, frictional sound of sand gravel, etc. The measurement recording unit of this device enables the desired sound to be picked out by reducing various noises other than the groundwater sound by using functions (filters) that restrict the frequencies from the measured source of sound.
The frequency restriction functions enable the noises generated at the site to be dealt with flexibly by setting 4 stages each for the low frequencies and high frequencies and by choosing an easy-to-be-heard combination from 16 types of combinations.

Groundwater aeration sound measuring device

Photo 1 Groundwater aeration sound measuring device

photo03

Fig. 1 Measurement of groundwater aeration sound

Explanations of various parts

Pickup sensor

The pickup sensor captures weak groundwater aeration sound.
The pickup sensor consists of (1) an acceleration sensor, (2) a sensor rod, and (3) an antivibration plate (Fig. 2).

Pickup sensor configuration

Fig. 2 Pickup sensor configuration

Types of fixation tools and how to use them

Accessories* To be available for sale shortly (now being prototyped)

Measurement recording unit

The measurement recording unit calculates the typical value of groundwater aeration sound by means of a frequency filter that reduces the noise components of the groundwater aeration sound, settings for the degree of amplification (sound loudness), and digital processing, and records the data in its internal memory.
The data thus recorded in the internal memory can be output to a personal computer to be provided separately.
Also, the groundwater aeration sound that has been captured in the frequency band and the degree of amplification (sound loudness) of the frequency filter that have been set is output to the headphone and LINE OUT (Photo 6).

Front view

Front view of the groundwater aeration sound measurement recording unit</figcaption>

Photo 6 Front view of the groundwater aeration sound measurement recording unit

Side views

Side view of the groundwater aeration sound measurement recording unit</figcaption> Side view of the groundwater aeration sound measurement recording unit</figcaption>
Photo 7 Side view of the groundwater aeration sound measurement recording unit

Headphone

The groundwater aeration sound that has been captured with the pickup sensor and has been frequency filter processed and processed for amplification by means of the measurement recording unit can be listened to on a real time basis.
It is a headphone of the tightly closed type having good sound reproducibility that enables the sound to be distinguished easily (Photo 8).

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Photo 8 Headphone

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