US1762102A - Sound-direction-determining apparatus - Google Patents

Sound-direction-determining apparatus Download PDF

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Publication number
US1762102A
US1762102A US271006A US27100628A US1762102A US 1762102 A US1762102 A US 1762102A US 271006 A US271006 A US 271006A US 27100628 A US27100628 A US 27100628A US 1762102 A US1762102 A US 1762102A
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US
United States
Prior art keywords
sound
determining apparatus
revolution
reflectors
reflector
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.)
Expired - Lifetime
Application number
US271006A
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English (en)
Inventor
Hofe Christian Von
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.)
Optische Anstalt CP Goerz AG
Original Assignee
Optische Anstalt CP Goerz AG
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.)
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Publication date
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Definitions

  • a sound direction determining apparatus which is designed for finding targets, moving on the ground.
  • Fig; 1' is a plan view of the sound direction determining apparatus
  • Fig. 2 is a transverse section of one ofthe sound leading reflectors.
  • the sound'direction determining apparatus shown has two receiving reflectors a and b and two sound leading reflectors c and d.
  • the first named reflectors are shaped as obliquely cut paraboloids while the last named .reflectors'are in the shape of ellipsoids.
  • One of the receiving reflectors and one of thesound leading reflectors are so connected with each other that the focus of the paraboloid coincides with the outer focus of the ellipsoid.
  • At each ofthe inner foci of the ellipsoids is located either a microphone or the ear of the sound observer.
  • the two ellipsoids c and d'withthe paraboloids a and b are rotatably mounted m a yoke I 50 fixed to an upright e, the one a being rotatbeing rotatable around a pivot h.
  • a screw rotatably mounted in the up right-e serves for adjusting the reflectors around the pivots g and h.
  • Each of the ellipsoids isprovided with two longitudinal slots j, located in a plane perpendicular to the plane determined by the axes A,' A, B, B, C, C, of the reflectors in the example shown in a vertical plane.
  • the slots 7' may be covered by strips of" rubber or the like cemented thereover for preventing rain, snow, dust-and soon from penetrating into the reflectors.
  • a sound direction determining apparatus comprising at least one sound receiving reflector formed of a paraboloid of revolution and at least one sound leading reflector in the form of an elongated ellipsoid of revolution, the said paraboloid and ellipsoid of revolution being confocal, and the sound leading reflector being provided with at least one slot extending in a meridian plane.
  • a sound direction determining apparatus comprising at least one sound receiving reflector formed of a paraboloid of revolution and at least one sound leading reflector in the form -of an elongated ellipsoid of revolution, the said paraboloid and ellipsoid of revolution being confocal, and the sound leading reflector/ being provided with at least one slot extending in a meridian plane perpendicular to the acoustic axis of the preceding reflector.
  • a sound direction determing apparatus comprising at least one sound receiving reflector formed of a paraboloid of revolution and. at least one sound leading reflector in the form of an elongated ellipsoid of revolution, the said paraboloid and ellipsoid of revolution being confocal, and the sound leading reflector being provided with at least one slot extending in a meridian plane, the said slot being covered by a sheet of soft material.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
US271006A 1927-05-07 1928-04-18 Sound-direction-determining apparatus Expired - Lifetime US1762102A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1762102X 1927-05-07

Publications (1)

Publication Number Publication Date
US1762102A true US1762102A (en) 1930-06-03

Family

ID=7742223

Family Applications (1)

Application Number Title Priority Date Filing Date
US271006A Expired - Lifetime US1762102A (en) 1927-05-07 1928-04-18 Sound-direction-determining apparatus

Country Status (2)

Country Link
US (1) US1762102A (zh)
NL (1) NL21316C (zh)

Also Published As

Publication number Publication date
NL21316C (zh)

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Cohan et al. The Contemporary Group Wind Quintet, May 25, 1972