Ultrasonic tank chamber

Unavailable from October 1 ,2006 to February 2,2007 because of construction work. We appreciate your understanding.

Material：Ferro-concrete
Tank dimension：9m (length) ×9m (width) ×9m (depth)
Anechoic device：Absorbers (Meyer rubber) attached to all sides and bottom (5 surfaces)

For observations involving the sample, the sample position can be controlled and determined either automatically or manually. Information on the sample position is displayed in digital format.

Item Explanation

Forward unit Span：9m
Speed control：10cm/s（max.)
Positioning precision：within±1cm

Lateral unit
Lateral span：6m
Lateral speed：１cm/s
Positioning precision：within±1cm

Vertical unit
Mounting weight：500Kg
Vertical motion range：
　　 2m above water and 4.5m underwater
Vertical speed：1cm/s
Positioning precision：within±5cm

Rotation unit
Rotation angle：
　　 370°clockwise, 370°ounter-clockwise
Rotation rate：3°/s to 0.5°/s
Angular precision：±0.5°

Item	Explanation
Forward unit	Span：9m Speed control：10cm/s（max.) Positioning precision：within±1cm
Lateral unit	Lateral span：6m Lateral speed：１cm/s Positioning precision：within±1cm
Vertical unit	Mounting weight：500Kg Vertical motion range：　　 2m above water and 4.5m underwater Vertical speed：1cm/s Positioning precision：within±5cm
Rotation unit	Rotation angle：　　 370°clockwise, 370°ounter-clockwise Rotation rate：3°/s to 0.5°/s Angular precision：±0.5°

he items necessary for obtaining the capacity of the underwater acoustic transducer and other underwater acoustic instruments can be calibrated automatically.

＊for cases in which standard hydrophones were used to create observed pulse waves.
Item Explanation

Items measured
Transducer voltage sensitivity,
directional characteristic,
and frequency characteristic

Measured modes Pulse waves or continuous waves

Frequency range
Approximately 5kHz～250kHz

＊for cases in which standard hydrophones were used to create observed pulse waves.
Item	Explanation
Items measured	Transducer voltage sensitivity, directional characteristic, and frequency characteristic
Measured modes	Pulse waves or continuous waves
Frequency range	Approximately 5kHz～250kHz

1) Calibration and measurement of underwater acoustic transducer characteristics
2) In-tank tests of various undersea instruments, sonar, and acoustic navigation instruments

(1) Contact the Research Facilities Group of the Research Support Department at MARITEC, JAMSTEC.
(2) Requests for facilities use must be submitted at least one week before use. Please follow the directions in the "Request Form for Facilities use and Equipment."
(3) Please ask the person in charge for costs related to facilities use.
■Head office in Yokosuka
　Natsushima-cho 2-15 Yokosuka City, Kanagawa Prefecture, 237-0061
　TEL: +81-468-67-9906 FAX: +81-468-67-9905

Unavailable from October 1 ,2006 to February 2,2007 because of construction work. We appreciate your understanding.

＊for cases in which standard hydrophones were used to create observed pulse waves. Item Explanation Items measured Transducer voltage sensitivity, directional characteristic, and frequency characteristic Measured modes Pulse waves or continuous waves Frequency range Approximately 5kHz～250kHz

＊for cases in which standard hydrophones were used to create observed pulse waves.
Item Explanation

Items measured
Transducer voltage sensitivity,
directional characteristic,
and frequency characteristic

Measured modes Pulse waves or continuous waves

Frequency range
Approximately 5kHz～250kHz