GB2413470A - Amplifier case forms passive acoustic resonator/horn - Google Patents

Amplifier case forms passive acoustic resonator/horn Download PDF

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Publication number
GB2413470A
GB2413470A GB0409219A GB0409219A GB2413470A GB 2413470 A GB2413470 A GB 2413470A GB 0409219 A GB0409219 A GB 0409219A GB 0409219 A GB0409219 A GB 0409219A GB 2413470 A GB2413470 A GB 2413470A
Authority
GB
United Kingdom
Prior art keywords
amplifier
horn
case
sound
acoustic resonator
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.)
Withdrawn
Application number
GB0409219A
Other versions
GB0409219D0 (en
Inventor
Andrew Thompson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0409219A priority Critical patent/GB2413470A/en
Publication of GB0409219D0 publication Critical patent/GB0409219D0/en
Publication of GB2413470A publication Critical patent/GB2413470A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Auxiliary Devices For Music (AREA)

Abstract

A protective case for a musical amplifier, e.g. a combination amplifier for use with a guitar, transforms into an amplifier stand and folded horn. The horn projects sound generated from the back of the loudspeaker via the folded horn arrangement in a focussed direction - normally forwards of the amplifier - to complement the sound generated from the front of the said speaker. This arrangement allows both the amplifier and passive resonator to be transported without taking up too much space.

Description

241 3470 Passive Acoustic Resonator/Case This invention relates to a case,
which converts to an amplifier stand/folded horn.
Most combination guitar amplifiers have open backed enclosures, which contain speakers connected to an amplifier. As a result of this design a large part of the sound generated from the back of the loudspeaker is lost to the surroundings behind the enclosure.
To overcome this, the present invention proposes a case for the combination amplifier, which converts to provide a stand for the said amplifier, incorporating a baffle-driven folded horn, which directs and passively amplifies the sound generated from the back of the loudspeaker in a forward direction.
The immediate advantage of this is that all the sound produced by the speaker is projected forwards in a focused manner....the tuned baffle and the nature of the cabinet also cause an alteration to the sound produced so that it is biased towards the lower end of the sound spectrum. Therefore, the resultant sound is both louder, and deeper than that produced by the amplifier alone.
Another advantage is that this device is a very efficient way of packing amplifier and resonator for transport and storage.
The invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 shows a possible design for the case arranged for the transportation of the combination amplifier contained therein.
Figure 2 shows the case rearranged to provide support for the combination amplifier as an amp stand, and as a passive resonator.
Figure 3 shows the principle by which the resonator operates.
Figure 1 shows the case/resonator in case mode, side and front profiles. The combination amplifier is contained securely within the case. The case is clamped with fasteners, and may be moved easily on the wheels. The interior of the case is lined with foam to provide further protection for the amplifier whilst in transit.
Figure 2 shows the rearrangement of the case to the passive resonator mode. The top piece of the case contains a second fastening, which allows it to be clamped into this position. At this point the baffle board is fitted to the bottom part of the case and the amplifier placed on the stand in a position as shown. The opening at the back of the amplifier lines up with an opening at the back of the stand. This opening may contain an acoustically transparent material, which will allow all the sound coming from the back of the loudspeaker to be channelled into the main body of the resonator case.
This sound is then focused by the baffle board, shown in figs 2 and 3, and projected forwards and through the opening provided underneath the amplifier.
The cabinet has three basic functions: 1. It is a case to protect the amplifier contained from physical damage whilst in transit; it also makes transportation easier since it has wheels.
2. By virtue of the design, the cabinet transforms into a stand for the said amplifier when in use on stage.
3. The nature of the design allows the sound produced by the back of the loudspeaker to be focused and projected (usually forward) by the incorporated baffle.
The materials from which the cabinet are constructed play an important part in the resultant sound; birch ply and pine both have particularly desirable acoustic properties.
The baffle board may be constructed from thin flexible wood, or polymeric material with desirable properties - a thin ply or fibreglass composite would work well.
The cabinet should also incorporate lockable wheels, handles and secure locking devices to facilitate transport.

Claims (5)

  1. Claims 1. A folding case which will protect a combination amplifier during
    transit, and transform by virtue of design to provide a stand for the said amplifier, which incorporates a folded horn to project sound generated from the back of the loudspeaker in a focused direction.
  2. 2. A folding case according to claim 1, in which the case is made from wood with desirable sound projection properties.
  3. 3. A folding case according to claim 1, in which the case is made from a polymeric/composite material with good projection properties.
  4. 4. A folding case according to claim 1, which maximises space with relation to packing, and transportation.
  5. 5. A folding case according to claim 1, which incorporates a baffle to project and focus the sound within the cabinet.
GB0409219A 2004-04-24 2004-04-24 Amplifier case forms passive acoustic resonator/horn Withdrawn GB2413470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0409219A GB2413470A (en) 2004-04-24 2004-04-24 Amplifier case forms passive acoustic resonator/horn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0409219A GB2413470A (en) 2004-04-24 2004-04-24 Amplifier case forms passive acoustic resonator/horn

Publications (2)

Publication Number Publication Date
GB0409219D0 GB0409219D0 (en) 2004-05-26
GB2413470A true GB2413470A (en) 2005-10-26

Family

ID=32344388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0409219A Withdrawn GB2413470A (en) 2004-04-24 2004-04-24 Amplifier case forms passive acoustic resonator/horn

Country Status (1)

Country Link
GB (1) GB2413470A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444754A (en) * 2006-12-16 2008-06-18 Gary Paul Nicholson Folding enclosure arrangement for audio-visual equipment
US9361862B2 (en) 2014-09-26 2016-06-07 Andrzej Marek Klemarewski Passive amplification system for stringed instruments

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577528A (en) * 1946-05-01 1951-12-04 Edward P Kennedy Speaker cabinet
US2589319A (en) * 1946-02-01 1952-03-18 Victor Animatograph Corp Portable sounding device
WO2001078476A1 (en) * 2000-04-07 2001-10-18 Smith Harold N Jr Sound enhancing speaker cabinet for a removable speaker assembly
US6520282B1 (en) * 2000-10-24 2003-02-18 Nysora, Inc. Sound enhancement mechanism for speaker sound system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589319A (en) * 1946-02-01 1952-03-18 Victor Animatograph Corp Portable sounding device
US2577528A (en) * 1946-05-01 1951-12-04 Edward P Kennedy Speaker cabinet
WO2001078476A1 (en) * 2000-04-07 2001-10-18 Smith Harold N Jr Sound enhancing speaker cabinet for a removable speaker assembly
US6520282B1 (en) * 2000-10-24 2003-02-18 Nysora, Inc. Sound enhancement mechanism for speaker sound system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2444754A (en) * 2006-12-16 2008-06-18 Gary Paul Nicholson Folding enclosure arrangement for audio-visual equipment
US9361862B2 (en) 2014-09-26 2016-06-07 Andrzej Marek Klemarewski Passive amplification system for stringed instruments

Also Published As

Publication number Publication date
GB0409219D0 (en) 2004-05-26

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)