US3815706A - Tremolo generating device having sound reflecting rotary member - Google Patents

Tremolo generating device having sound reflecting rotary member Download PDF

Info

Publication number
US3815706A
US3815706A US00366689A US36668973A US3815706A US 3815706 A US3815706 A US 3815706A US 00366689 A US00366689 A US 00366689A US 36668973 A US36668973 A US 36668973A US 3815706 A US3815706 A US 3815706A
Authority
US
United States
Prior art keywords
sound
rotary member
rotating
rotary
wall
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
US00366689A
Other languages
English (en)
Inventor
Y Nagai
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Application granted granted Critical
Publication of US3815706A publication Critical patent/US3815706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/043—Continuous modulation
    • G10H1/047—Continuous modulation by acousto-mechanical means, e.g. rotating speakers or sound deflectors

Definitions

  • the rotary member is rotat- 52 us. a. 181/31 B, 181/27 A able adjacent to the speaker, g g the sound 51] 1111.01 G10k 13/00, H04r 1/28' fleeting Wall Periodically in confronting relationship [58] Field of Search .1 .Q l8l/2 7 A, 31 B with respect to the speaker whereby the sound emit l I ted from the speaker is reflected by the sound reflect- [56] References Cited ing wall and thereafter radiated through the irregularily cutout portion of the sheltering upper wall, 2 062 5 l5 Z JL PATENTS 18 N A producing a resultant complicated tremolo or like muosc e 2,450,139 9/1948 Hartsough....
  • the genral object of the present invention is to provide a sound effect generating device for electronic musical instrument, which produces tremolo and chorus effects of sufficient variation through the rotation of a sound reflecting member rotatably disposed adjacent to a speaker.
  • the former one is as shown in FIG. 1 wherein a sound generating reflection plate 3 is pivotally received at its center to a rotary shaft 2 at its one end so as to rotatably move within a optional plane, and a sleeve 4 slidably mounted on the shaft 2 is connected to a side portion of the sound reflection plate 3 with a connector 5, and a speaker 6 is provided opposite to the plate 3, whereby a tremolo effect is produced by tiltably rotating the sound reflection plate 3.
  • rotary disk (or. member) 7A (or 7B) is rotatedat a required speed via a belt by a motor 1 thereby giving a tremolo effect to a sound produced from the speakers 6.
  • the device disclosed in U.S. Pat. No. 3,100,024 is arranged such that a cylindrical speaker structure 8 including a plurality of speakers 6 as shown in FIG. is rotated via a belt and rotary shaft by a motor 1 and said speakers are to be supplied low frequency currents through slip-rings R.
  • This system provides that thespeakers are rotated in a same plane thereby producing some vibrato effect but such vibrato lacks a variation of the sound. No musically satisfied sound was obtained.
  • the supporting disk 9 is also rotated about another axis-perpendicular to the axis 1a, thereby producing vibrato or tremolo effect due to Doppler effect.
  • Such sound does not yet give a satisfactory musical sound of tremolo effect since such sound cannot be enhanced in a vertical direction because the speakers rotate only in horizontal plane, radiating the sound in the same plane.
  • the general object of the present invention is to provide a sound effect generating .device for electronic musical instrument, which produces tremolo and chorus effects of sufficient variation through the rotation of a sound reflecting member rotatably disposed adjacent to a speaker.
  • the sound effect generating device comprises a speaker, and a rotary member rotatably disposed adjacent to the speaker, the rotary member having a sound reflecting curved wall, the rotation of the rotary member bringing the sound reflecting wall periodically in confronting relationship with respect to the speaker.
  • the above-mentioned rotary member further has a sheltering upper wall spreading over the sound reflecting wall, the sheltering upper wall having an irregularily cutout portion.
  • the sound effect generating device further comprises another rotary member rotatable concentrically with respect to the first-mentioned rotary member, said another rotary memberhaving a sound reflecting curved wall, the rotation of said another rotary member bringing the sound reflecting wall thereof periodically in confronting relationship with respect to the speaker.
  • the above-mentioned speaker is rotatable.
  • FIGS. 1-6 are constitutional figures showing prior art devices producing a tremolo or similar effect
  • FIG. 7 is a sectional view of one embodiment of this invention.
  • FIG. 8 is a plan view showing an embodiment of a rotary member used in this invention.
  • FIG. 9 is a sectional view showing another modification of this invention.
  • FIG. 10 is a perspective view of the rotary member shown in FIG. 9; and FIGS. ll--l2 are sectional views showing further modifications of this invention.
  • a base 10 on a base 10 is rigidly mounted a speaker SP by means of an L shape fixture l1, and a rotary member 12 is pivotably fixed to the base 10 through a rotary shaft 13.
  • the rotary shaft 13 is rigidly connected at the upper end to the rotary member 12 and at the lower end to apulley 14, which is connected to a pulley 16 of a motor M by means of a belt l5,so that the rotational force of the motor M is transmitted to the pulley 14, thereby rotating the rotary member 12 about the shaft 13.
  • the rotational speed of the rotary member 12 is usually set to 05-15 revolutions per second.
  • the rotary member 12 has a vertical concaved wall 12a depicting a curvature conforming to an arc of a circle having a center at the shaft 13.
  • the abovementioned circle is indicated by a chain line A in FIG.
  • the rotary member 12 further has a sheltering upper wall 12b extending horizontally from the vertical concaved wall 12a up to the shaft 13.
  • the sheltering upper wall 12b has irregularily cutout portions 12c and 12d.
  • the irregularily cutout portion 12c is an irregularily shaped end edge of the upper wall 12b, and the other irregularily cutout portion l2dis an irregularily shaped opening provided in the upper wall 12b. 1
  • the aforesaid rotary shaft 13 is connected to the upper wall 12b of the rotary member 12.
  • the speaker SP is disposed-within the circle A adjacent to the circumference thereof and is so directed as to radiate sound toward the rotary shaft 13.
  • the rotation of the rotary member 12 about the shaft 13 brings the vertical concaved wall 12a periodically in confronting relationship with respect to the speaker SP.
  • FIG. 9 another rotary member 17 is provided in addition to the sound effect generating device shown in FIGS. 7 and 8.
  • the rotary member 17 is fixed to a rotary shaft 18, which is rotatable about'the shaft 13 separately from the latter shaft 13.
  • the rotary shaft 18 is fixed at its lower end to a pulley 19, which in turn is rotatably connected to another pulley 21 of the motor M by means of a belt 20, so that the rotational force is transmitted from the motor M to the rotary member
  • the rotary member 17 comprises a vertical plate member having a sound reflecting curved wall, as shown in FIG. 10 and further indicated by a dotted line in FIG. 8.
  • the rotation of the rotary member 17 also permits the sound reflecting curved wall thereof to come periodically in confronting relationship with respect to the speaker SP, at each time reflecting sound emitted from the speaker.
  • the sound thus reflected by the rotary member 17 is further reflected and radiated in the same manner as explained in the previous embodiment.
  • both rotary members 12 and 17 provide a complicated sound passage, and the sound passing through said passage is radiated with a more musically complicated variable tremolo effect.
  • FIG. 11 shows another modification wherein another motor M is added to rotate the rotary shaft 18.
  • the rotary member 17 is rotatable at a rotational speed different from that of the rotarymember 12, as desired.
  • FIG. 12 Further modification is shown in FIG. 12 wherein the speaker SP itself is made rotatable.
  • the speaker SP is fixed to a rotary shaft 22, which is rotatably mounted on the base 10.
  • the rotary shaft 22 is fixed at its lower end to'a pulley 23 coupled to a pulley 25 of the motor M through a belt 24, so that the rotation of the motor M is transmitted to the rotary shaft 22 to rotate the speaker SP.
  • the speaker SP itself is permitted to rotate about the rotary shaft 22, radiating sound therearound and as a result producing a more complicated sound effect.
  • the rotary member having the sound reflecting curved wall is rotated adjacent to the speaker, and the sound emitted from the speaker is effectively reflected by the rotating sound reflecting wall. Further. the sound thus reflected may be radiated through the irregularily cutout portion or portions, with a result that the radiating sound becomes more complicated. Still further, rotating the speaker simultaneously, more clear frequency modulation is effected and placing a suitable sound absorber member and a sound reflection member within the rotary member, more satisfactory sound with a good tremolo effect is obtained.
  • the device according to this invention is most suitable for tremolo generating devices in electronic musical instruments.
  • Sound effect producing device comprising a first rotary member rotatable about an axis depicting a circle having a center at said axis, said rotary member having a sound reflecting curved wall rotatable at a distance from said axis; means for rotating said rotary member; and a sound emitting member disposed adjacent. to within the circumference of said circle and emitting sound in a direction from the circumference of the circle to the center thereof, the rotation of said rotating member bringing said sound reflecting curved wall periodically in confronting relationship with re-- spect to the sound emitting member, whereby the sound emitted from the sound emitting member is periodically reflected by said sound reflecting curved wall.
  • said rotary member further has a sheltering wall spreading-over said sound reflecting curved wall, said sheltering wall having at least one portion cutout in an irregular shape to permit the sound reflected by the sound reflecting wall to be radiated therethrough.
  • Sound effect producing device as claimed in claim 1, further comprising a second rotary member rotatable about said axis, and means for rotating said second rotary member, said second rotary member rotating separately from said first rotary member, said second rotary member having a curved wall, the rotation of said second rotary member bringing said curved wall of said second rotary member periodically in confronting relation with respect to the sound emitting member.
  • Sound effect producing device as claimed in claim 2, further comprising a second rotary member rotatable about said axis, and means for rotating said second rotary member, said second rotary member rotating separately from said first rotary member, said second rotary member having a curved wall, the rotation of said second rotary member bringing said curved wall of said second rotary member periodically in confronting relationship with respect to the sound emitting member.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
US00366689A 1972-06-08 1973-06-04 Tremolo generating device having sound reflecting rotary member Expired - Lifetime US3815706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5725172A JPS5433127B2 (enrdf_load_stackoverflow) 1972-06-08 1972-06-08

Publications (1)

Publication Number Publication Date
US3815706A true US3815706A (en) 1974-06-11

Family

ID=13050298

Family Applications (1)

Application Number Title Priority Date Filing Date
US00366689A Expired - Lifetime US3815706A (en) 1972-06-08 1973-06-04 Tremolo generating device having sound reflecting rotary member

Country Status (2)

Country Link
US (1) US3815706A (enrdf_load_stackoverflow)
JP (1) JPS5433127B2 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5649015A (en) * 1993-08-24 1997-07-15 Midnite Kitty, Inc. Speaker simulator
WO2008112878A1 (en) * 2007-03-13 2008-09-18 Audiovox Corporation Movable speaker covering

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062515A (en) * 1935-02-26 1936-12-01 Heschke Wilhelmina Tremolo device
US2450139A (en) * 1943-09-20 1948-09-28 Hartsough Baron Tone cabinet for electric organs
US2780302A (en) * 1955-08-08 1957-02-05 Thomas J George Acoustic vibrato device for electronic organ
US3192322A (en) * 1962-09-24 1965-06-29 Electro Music Continuously rotating selectively operable apparatus for producing vibrato and tremolo

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062515A (en) * 1935-02-26 1936-12-01 Heschke Wilhelmina Tremolo device
US2450139A (en) * 1943-09-20 1948-09-28 Hartsough Baron Tone cabinet for electric organs
US2780302A (en) * 1955-08-08 1957-02-05 Thomas J George Acoustic vibrato device for electronic organ
US3192322A (en) * 1962-09-24 1965-06-29 Electro Music Continuously rotating selectively operable apparatus for producing vibrato and tremolo

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5649015A (en) * 1993-08-24 1997-07-15 Midnite Kitty, Inc. Speaker simulator
WO2008112878A1 (en) * 2007-03-13 2008-09-18 Audiovox Corporation Movable speaker covering
US8189849B2 (en) 2007-03-13 2012-05-29 Steve Waddell Movable speaker covering

Also Published As

Publication number Publication date
JPS4918019A (enrdf_load_stackoverflow) 1974-02-18
JPS5433127B2 (enrdf_load_stackoverflow) 1979-10-18

Similar Documents

Publication Publication Date Title
US3509290A (en) Flat-plate type loudspeaker with frame mounted drivers
JPH0738754B2 (ja) 広拡散バッフルを有するラウドスピーカシステム
Meyer Directivity of the bowed stringed instruments and its effect on orchestral sound in concert halls
CN1339149A (zh) 乐器
US2373560A (en) Sound recording method and apparatus
US3815706A (en) Tremolo generating device having sound reflecting rotary member
US3888333A (en) Tremolo generating device with multi-directionally rotating speaker
US2869667A (en) Rotatable tremulant sound producer
US3478837A (en) Rotary sound source with optically enhanced vibrato
US2995054A (en) Rotary tremolo device having means for mixing signals emanating from rotary and non-rotary sources
US2622692A (en) Apparatus for imposing vibrato on sound
US4308428A (en) System for electronically simulating radiation effects produced by a rotary loudspeaker
US5848166A (en) Hybrid electronic and electromechanical device for the production of tremulant sound
US2033232A (en) Electronic sound producing system
US2491674A (en) Rotatable loud-speaker support with associated stationary baffle
US2441425A (en) Sound reproducing system
JP2002513265A (ja) 音響エネルギの再分配のための装置
US4035582A (en) Tremolo effect producing system
JP2720459B2 (ja) 鍵盤楽器
USRE23323E (en) Rot at able tremulant sound
JPWO2007069614A1 (ja) スピーカー装置
US3157247A (en) Sound producing system
JPH02265397A (ja) 音響装置
US3842205A (en) Tremolo effect producing acoustic filter system
US3695385A (en) Variable distance doppler generator