JPS554039A - Acoustic holography apparatus - Google Patents

Acoustic holography apparatus

Info

Publication number
JPS554039A
JPS554039A JP7641278A JP7641278A JPS554039A JP S554039 A JPS554039 A JP S554039A JP 7641278 A JP7641278 A JP 7641278A JP 7641278 A JP7641278 A JP 7641278A JP S554039 A JPS554039 A JP S554039A
Authority
JP
Japan
Prior art keywords
signals
frequency
hologram
acoustic
acoustic images
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7641278A
Other languages
Japanese (ja)
Other versions
JPS619633B2 (en
Inventor
Takuro Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7641278A priority Critical patent/JPS554039A/en
Publication of JPS554039A publication Critical patent/JPS554039A/en
Publication of JPS619633B2 publication Critical patent/JPS619633B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Holo Graphy (AREA)

Abstract

PURPOSE: To enable acoustic images concerning the specific frequency to be displayed through one scanning on hologram face by converting acoustic wave signals from time region to frequency region and processing the signals.
CONSTITUTION: A signal processing part 12 provides hologram signals l, i.e., crosspower spectrum signals of sound wave signals by its calculating parts 15 thru 18 because the components of the frequency f1 become A1B1 cosα1 in real number part and A1B1sinα1 in imaginary number part if the signals of the frequency f1 contained in the sound wave signals i, k are let to be A1cos2πf1t, B1cos(2πf1 + α1). similarily, the hologram signals may be obtained at one time within the range that Fourier transformation can be made even with other frequency fn at sound source. By beforehand storing these signals l in a memory device 19, the acoustic images may be obtained with various frequency components through operation of the hologram unit, i,e., one scanning by a moving wave receiver, and repeated reproduction and display, synthesis of acoustic images, etc. may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP7641278A 1978-06-26 1978-06-26 Acoustic holography apparatus Granted JPS554039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7641278A JPS554039A (en) 1978-06-26 1978-06-26 Acoustic holography apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7641278A JPS554039A (en) 1978-06-26 1978-06-26 Acoustic holography apparatus

Publications (2)

Publication Number Publication Date
JPS554039A true JPS554039A (en) 1980-01-12
JPS619633B2 JPS619633B2 (en) 1986-03-25

Family

ID=13604511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7641278A Granted JPS554039A (en) 1978-06-26 1978-06-26 Acoustic holography apparatus

Country Status (1)

Country Link
JP (1) JPS554039A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020094904A (en) * 2018-12-12 2020-06-18 Ｔｏｙｏ Ｔｉｒｅ株式会社 Sound source probing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01255725A (en) * 1988-03-31 1989-10-12 Aisin Seiki Co Ltd Clutch plate of hydraulic multiple disk clutch

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON SONICS AND ULTRASONICS *
THE JOURNAL OF THE ACOUSTICAL SOSIETY OF AMERICA *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020094904A (en) * 2018-12-12 2020-06-18 Ｔｏｙｏ Ｔｉｒｅ株式会社 Sound source probing method

Also Published As

Publication number Publication date
JPS619633B2 (en) 1986-03-25

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