WO2004095418A1 - Acoustic generator having an air-blowing hole, an air-compression chamber and a membrane - Google Patents

Acoustic generator having an air-blowing hole, an air-compression chamber and a membrane Download PDF

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Publication number
WO2004095418A1
WO2004095418A1 PCT/PL2003/000113 PL0300113W WO2004095418A1 WO 2004095418 A1 WO2004095418 A1 WO 2004095418A1 PL 0300113 W PL0300113 W PL 0300113W WO 2004095418 A1 WO2004095418 A1 WO 2004095418A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonance chamber
air
membrane
chamber
generator
Prior art date
Application number
PCT/PL2003/000113
Other languages
French (fr)
Inventor
Waldemar Gibaszewski
Andrzej Grabkowski
Zbigniew Nalej
Original Assignee
Waldemar Gibaszewski
Andrzej Grabkowski
Zbigniew Nalej
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 Waldemar Gibaszewski, Andrzej Grabkowski, Zbigniew Nalej filed Critical Waldemar Gibaszewski
Priority to AU2003304051A priority Critical patent/AU2003304051A1/en
Publication of WO2004095418A1 publication Critical patent/WO2004095418A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/02—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated
    • G10K9/04—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers driven by gas; e.g. suction operated by compressed gases, e.g. compressed air

Definitions

  • the invention relates to an acoustic generator, designed for generating single-tone alarm sounds or similar sounds, during entertainment events, for supporting sports contests, or in similar circumstances.
  • Acoustic generators serving as sources of single-tone sounds, used for emitting alarm signals, are known.
  • An example of such a generator is known from Polish Patent No. 62128.
  • the generator disclosed therein has a housing with an air compression chamber which emits acoustic waves.
  • Said chamber has an air intake and is closed at its rear end with a membrane.
  • the generator is equipped with an outlet horn, and additionally with a damping collector and a corrective barrier.
  • the Polish Utility Model Specification No. Ru 57400 discloses another acoustic generator used for generating said type of sounds during entertainment events.
  • Said generator comprises a cylindrical body having an external circumferential flange and a funnel-shaped outlet horn. A membrane mounted to the flange is secured by a cap with holes.
  • the cylindrical body contains an air compression chamber which emits acoustic waves and is provided with a hole for blowing the air into the compression chamber.
  • the chambers being the source of acoustic waves in these known generators have complicated shapes and are difficult to form.
  • Such chambers are formed inside the body of the acoustic generator, and then covered with a membrane.
  • the object of the present invention is to eliminate drawbacks of known acoustic generators.
  • the acoustic generator of the invention contains an air compression chamber with an air blowing hole for blowing air into the compression chamber, and a membrane allowing the air to flow into a resonance chamber which is ended with an outlet horn, and it is characterized in that the compression chamber is situated between the internal wall of a body and the external surface of the resonance chamber, wherein said body is drawn over said resonance chamber and is mounted thereon; and wherein said resonance chamber is conical in its section surrounded by the body.
  • the resonance chamber and the body are both frustoconical, and said body is drawn over and mounted on the resonance chamber in such a manner that the end of the body opposite to the membrane is located in a central part of the resonance chamber, wherein said gen- erator has its smallest diameter at the region of the end of the body opposite to the membrane, and the smaller base of resonance chamber extends beyond the plane of the larger base of the body, the membrane being pressed against the edge of the inlet of the resonance chamber.
  • the body is sleeve-shaped.
  • An elastic sealing band may be mounted to the periphery of the body mounted on the resonance chamber.
  • the membrane is preferably made of rubber, and it is clamped around the periphery of the body with a band clip.
  • the external surface of the body and the external surface of resonance chamber, accessible when the body is mounted, may be surrounded by a tubing made of a heat-shrinkable film.
  • the air blowing hole may be provided with a mouthpiece.
  • the acoustic generator of the invention has a very simple construction, as it is composed of two simple, sleeve-shaped elements, none of them requiring an additional air compression chamber to be formed within.
  • the rubber membrane clamped around the periphery of the body of the generator with an band clip, makes it possible to modulate the key of sounds generated by the generator in a simple manner, by appropriate clamping said membrane at the inlet of the resonance chamber.
  • the use of the heat-shrinkable film as the external tubing around the generator helps to keep it in a determined shape.
  • Fig. 1 is a sectional view of an embodiment of the generator of the invention
  • Fig. 2 is a sectional view of a simpler embodiment of the generator of the invention.
  • the acoustic generator contains an air compression chamber 1 with an air blowing hole 2 for blowing air into the compression chamber 1, a resonance chamber 3 ended with an outlet horn 4, and a membrane 5 allowing the air to flow from the compression chamber 1 into the resonance chamber 3.
  • the air compression chamber 1 is situated between the internal wall of a body 6 and the external surface of the resonance chamber 3, wherein said body 6 is drawn over said resonance chamber 3 and mounted thereon.
  • the resonance chamber 3 is conical in its section surrounded by the body 6.
  • Fig. 1 shows an embodiment of the acoustic generator with the body 6 sleeve-shaped.
  • the periphery of the body 6 mounted on the resonance chamber is fitted with an elastic sealing band 7.
  • the membrane 5 of said generator is made of rubber, and it is clamped around the periphery of body 6 with a band clip 8. The membrane 5 is pressed against the edge of the inlet of the resonance chamber.
  • the external surface of the body 6 and the external surface of the resonance chamber 3, which are accessible when the body 6 is mounted, are surrounded by a tubing 9 made of a heat-shrinkable film. Additionally the air blowing hole 2 is provided with a mouthpiece 10.
  • Fig. 2 shows a simplified embodiment of the generator of the invention, wherein the resonance chamber 3 and the body 6 are both frustoconical, and said body 6 is drawn over and mounted on the resonance chamber 3 in such a manner that the end of the body 6 opposite to the membrane 5 is located in a central part of the resonance chamber 3.
  • the generator has its smallest diameter at the region of the end of the body 6 opposite to the membrane 5.
  • the smaller base of resonance chamber 3 extends beyond the plane of the larger base of body 6.
  • the air, blown into the compression chamber 1 through the air blowing hole 2, having reached appropriate pressure in the compression chamber 1, causes a slit to appear between the membrane 5 and the edge of the smaller base of the of resonance chamber 3, at the inlet of the resonance chamber 3, which causes flow of the air into the resonance chamber 3. Sound waves are generated which is emitted from the outlet horn 4.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

The acoustic generator according to the invention contains an air compression chamber (1) with an air blowing hole (2) for blowing air into the compression chamber, and a membrane (5) allowing the air to flow into a resonance chamber (3) which is ended with an outlet horn (4), and it is characterized in that the compression chamber (1) is situated between the internal wall of a body (6) and the external surface of the resonance chamber (3), wherein said body (6) is drawn over said resonance chamber (3) and mounted thereon; and wherein said resonance chamber (3) is conical in its section surrounded by the body (6). The generator is designed for generating single-tone alarm sounds or similar sounds, during entertainment events, for supporting sportive contest, or in similar circumstances.

Description

ACOUSTIC GENERATOR HAVING AN AIR-BLOWING HOLE , AN AIR-COMPRESSION CHAMBER AND A
MEMBRANE
The invention relates to an acoustic generator, designed for generating single-tone alarm sounds or similar sounds, during entertainment events, for supporting sports contests, or in similar circumstances.
Acoustic generators serving as sources of single-tone sounds, used for emitting alarm signals, are known. An example of such a generator is known from Polish Patent No. 62128. The generator disclosed therein has a housing with an air compression chamber which emits acoustic waves. Said chamber has an air intake and is closed at its rear end with a membrane. At its front end the generator is equipped with an outlet horn, and additionally with a damping collector and a corrective barrier. The Polish Utility Model Specification No. Ru 57400 discloses another acoustic generator used for generating said type of sounds during entertainment events. Said generator comprises a cylindrical body having an external circumferential flange and a funnel-shaped outlet horn. A membrane mounted to the flange is secured by a cap with holes. The cylindrical body contains an air compression chamber which emits acoustic waves and is provided with a hole for blowing the air into the compression chamber.
The chambers being the source of acoustic waves in these known generators have complicated shapes and are difficult to form. Such chambers are formed inside the body of the acoustic generator, and then covered with a membrane.
It is technologically difficult to mount the membrane within the known generators, and precisely defined parameters of production and assembly have to be observed.
The object of the present invention is to eliminate drawbacks of known acoustic generators.
The acoustic generator of the invention contains an air compression chamber with an air blowing hole for blowing air into the compression chamber, and a membrane allowing the air to flow into a resonance chamber which is ended with an outlet horn, and it is characterized in that the compression chamber is situated between the internal wall of a body and the external surface of the resonance chamber, wherein said body is drawn over said resonance chamber and is mounted thereon; and wherein said resonance chamber is conical in its section surrounded by the body.
Preferably the resonance chamber and the body are both frustoconical, and said body is drawn over and mounted on the resonance chamber in such a manner that the end of the body opposite to the membrane is located in a central part of the resonance chamber, wherein said gen- erator has its smallest diameter at the region of the end of the body opposite to the membrane, and the smaller base of resonance chamber extends beyond the plane of the larger base of the body, the membrane being pressed against the edge of the inlet of the resonance chamber.
In a preferred embodiment of the generator the body is sleeve-shaped. An elastic sealing band may be mounted to the periphery of the body mounted on the resonance chamber.
The membrane is preferably made of rubber, and it is clamped around the periphery of the body with a band clip.
The external surface of the body and the external surface of resonance chamber, accessible when the body is mounted, may be surrounded by a tubing made of a heat-shrinkable film.
The air blowing hole may be provided with a mouthpiece.
The acoustic generator of the invention has a very simple construction, as it is composed of two simple, sleeve-shaped elements, none of them requiring an additional air compression chamber to be formed within. The rubber membrane, clamped around the periphery of the body of the generator with an band clip, makes it possible to modulate the key of sounds generated by the generator in a simple manner, by appropriate clamping said membrane at the inlet of the resonance chamber. The use of the heat-shrinkable film as the external tubing around the generator helps to keep it in a determined shape.
The acoustic generator of the invention will be described by means of the preferred em- bodiments with reference to the attached drawing, wherein:
Fig. 1 is a sectional view of an embodiment of the generator of the invention;
Fig. 2 is a sectional view of a simpler embodiment of the generator of the invention.
The acoustic generator contains an air compression chamber 1 with an air blowing hole 2 for blowing air into the compression chamber 1, a resonance chamber 3 ended with an outlet horn 4, and a membrane 5 allowing the air to flow from the compression chamber 1 into the resonance chamber 3. The air compression chamber 1 is situated between the internal wall of a body 6 and the external surface of the resonance chamber 3, wherein said body 6 is drawn over said resonance chamber 3 and mounted thereon. The resonance chamber 3 is conical in its section surrounded by the body 6. Fig. 1 shows an embodiment of the acoustic generator with the body 6 sleeve-shaped. The periphery of the body 6 mounted on the resonance chamber is fitted with an elastic sealing band 7. The membrane 5 of said generator is made of rubber, and it is clamped around the periphery of body 6 with a band clip 8. The membrane 5 is pressed against the edge of the inlet of the resonance chamber. The external surface of the body 6 and the external surface of the resonance chamber 3, which are accessible when the body 6 is mounted, are surrounded by a tubing 9 made of a heat-shrinkable film. Additionally the air blowing hole 2 is provided with a mouthpiece 10. Fig. 2 shows a simplified embodiment of the generator of the invention, wherein the resonance chamber 3 and the body 6 are both frustoconical, and said body 6 is drawn over and mounted on the resonance chamber 3 in such a manner that the end of the body 6 opposite to the membrane 5 is located in a central part of the resonance chamber 3. The generator has its smallest diameter at the region of the end of the body 6 opposite to the membrane 5. In the both embodiments of acoustic generator the smaller base of resonance chamber 3 extends beyond the plane of the larger base of body 6. The air, blown into the compression chamber 1 through the air blowing hole 2, having reached appropriate pressure in the compression chamber 1, causes a slit to appear between the membrane 5 and the edge of the smaller base of the of resonance chamber 3, at the inlet of the resonance chamber 3, which causes flow of the air into the resonance chamber 3. Sound waves are generated which is emitted from the outlet horn 4.

Claims

Claims
1. An acoustic generator contains an air compression chamber with an air blowing hole for blowing air into the compression chamber, and a membrane allowing the air to flow into a resonance chamber which is ended with an outlet horn, characterized in that the compression chamber (I) is situated between the internal wall of a body (6) and the external surface of the reso- nance chamber (3), wherein said body (6) is drawn over said resonance chamber (3) and is mounted thereon; and wherein said resonance chamber (3) is conical in its section surrounded by the body (6).
2. The generator according to Claim 1, characterized in that the resonance chamber (3) and the body (6) are both frustoconical, and said body (6) is drawn over and mounted on the resonance chamber (3) in such a manner that the end of the body (6) opposite to the membrane (5) is located in a central part of the resonance chamber (3), wherein said generator has its smallest diameter at the region of the end of the body (6) opposite to the membrane (5), and the smaller base of resonance chamber (3) extends beyond the plane of the larger base of the body (6), the membrane (5) being pressed against the edge of the inlet of the resonance chamber (3).
3. The generator according to Claim 2, characterized in that the body (6) is sleeve- shaped.
4. The generator according to Claim 2 or Claim 3, characterized in that an elastic sealing band (7) is mounted to the periphery of the body (6) mounted on the resonance chamber (3).
5. The generator according to Claim 4, characterized in that the membrane (5) is made of rubber, and it is clamped around the periphery of the body (6) with a band clip (8).
6. The generator according to Claim 5, characterized in that the external surface of the body (6) and the external surface of the resonance chamber (3) accessible when the body (6) is mounted, are surrounded by a tubing (9) made of a heat-shrinkable film.
7. The generator according to Claim 6, characterized in that the air blowing hole (2) is provided with a mouthpiece (10).
PCT/PL2003/000113 2003-04-22 2003-10-28 Acoustic generator having an air-blowing hole, an air-compression chamber and a membrane WO2004095418A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003304051A AU2003304051A1 (en) 2003-04-22 2003-10-28 Acoustic generator having an air-blowing hole, an air-compression chamber and a membrane

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL03359799A PL359799A1 (en) 2003-04-22 2003-04-22 Sound transmitter
PLP-359799 2003-04-22

Publications (1)

Publication Number Publication Date
WO2004095418A1 true WO2004095418A1 (en) 2004-11-04

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ID=33308656

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2003/000113 WO2004095418A1 (en) 2003-04-22 2003-10-28 Acoustic generator having an air-blowing hole, an air-compression chamber and a membrane

Country Status (3)

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AU (1) AU2003304051A1 (en)
PL (1) PL359799A1 (en)
WO (1) WO2004095418A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006062490A1 (en) * 2004-12-10 2006-06-15 Jameleddine Fekih Sound generator equipped with a horn
WO2007101373A1 (en) * 2006-03-07 2007-09-13 Dongguan Changping Longqi Plastic Products Factory A multipurpose bugle for cheering

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700316A (en) * 1955-01-25 Dual chamber diaphragm resonator and sound device -
DE9317328U1 (en) * 1993-11-12 1994-01-20 Hoffmann, Siegfried, 97892 Kreuzwertheim Device for generating sound
DE29620253U1 (en) * 1996-11-21 1997-02-27 Heitmann, Peter, 31552 Rodenberg Acoustic signaling instrument
DE20208877U1 (en) * 2002-06-07 2002-09-05 Schroeter, Axel, 58313 Herdecke Acoustic horn

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700316A (en) * 1955-01-25 Dual chamber diaphragm resonator and sound device -
DE9317328U1 (en) * 1993-11-12 1994-01-20 Hoffmann, Siegfried, 97892 Kreuzwertheim Device for generating sound
DE29620253U1 (en) * 1996-11-21 1997-02-27 Heitmann, Peter, 31552 Rodenberg Acoustic signaling instrument
DE20208877U1 (en) * 2002-06-07 2002-09-05 Schroeter, Axel, 58313 Herdecke Acoustic horn

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006062490A1 (en) * 2004-12-10 2006-06-15 Jameleddine Fekih Sound generator equipped with a horn
WO2007101373A1 (en) * 2006-03-07 2007-09-13 Dongguan Changping Longqi Plastic Products Factory A multipurpose bugle for cheering

Also Published As

Publication number Publication date
PL359799A1 (en) 2004-11-02
AU2003304051A1 (en) 2004-11-19

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