CN102110434B - Digital sound production device of vertical piano - Google Patents
Digital sound production device of vertical piano Download PDFInfo
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- CN102110434B CN102110434B CN2011100451642A CN201110045164A CN102110434B CN 102110434 B CN102110434 B CN 102110434B CN 2011100451642 A CN2011100451642 A CN 2011100451642A CN 201110045164 A CN201110045164 A CN 201110045164A CN 102110434 B CN102110434 B CN 102110434B
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Abstract
The invention discloses a digital sound production device of a vertical piano, which comprises a piano body (1) and loudspeakers (4), wherein the rear part of the piano body (1) is provided with a hollow box body; a sound box board (8) is arranged in the hollow box body on the rear part of the piano body (1) transversely; the hollow box body is partitioned into an upper high-frequency sound box (2) and a lower low-frequency sound box (3) through the sound box board (8); a clapboard (5) is arranged in the low-frequency sound box (3); two loudspeaker holes are formed on the sound box board (8); the loudspeakers (4) are arranged in the two loudspeaker holes; and the back board walls of a left sound box body and a right sound box body of the low-frequency sound box (3) are provided with a guide hole (6) respectively. By the device, the sound box board is used for separating the high-frequency sound box from the low-frequency sound box, the low-frequency sound box is partitioned into two box bodies through the clapboard, and the problems of phase interference and short circuit of low-frequency sound are effectively solved; and the device has fine, well-bedded and ambient tone quality and can bring strong hearing sense shock to a listener.
Description
Technical field
The present invention relates to a kind of sound-producing device, relate in particular to the digital sound-producing device of a kind of upright piano.
Background technology
When sound wave when frequency is low, the propagation of sound wave has very strong diffracting power, and is almost non-directional.Therefore the sound of loudspeaker can diffraction to the front of vibrating diaphragm, and should be preceding sound wave and the synthesizing of back sound wave at the sound that certain point in the place ahead of loudspeaker is heard.If two sound waves are identical in the phase place of this point, then this synthetic acoustic pressure increases; If two sound wave phase places are opposite, then the acoustic pressure of this point reduces, even is the zero sound of can't hear.At this moment phenomenon is similar to the phenomenon that short circuit makes electric voltage dropping, causes the sound short circuit.At different frequency; The phase differential of two sound waves is different; Synthetic acoustic pressure is also different, has caused the acoustic pressure uneven distribution of different frequency, causes the above-mentioned two kinds of phase interferences of phenomenon and the sound short circuit of phase interference; The phenomenon that show that mainly low-frequency sound is thin, fly away, muddiness etc. has a strong impact on tonequality, the quality of sound-producing device has directly influenced the quality of piano tonequality.
Like Chinese patent publication No.: CN2036692U; The day for announcing: the utility model discloses a kind of novel upright piano on Dec 26th, 1989, it has set up high frequency audio castanets and bass castanets on the basis of light-duty upright piano; Two resonant tanks and a cover overtone hoisting gear; Constitute high frequency sympathetic response audio amplifier by the high frequency audio castanets, also be provided with a cover electro-acoustic conversion device, loudspeaker is installed in the back side of sympathetic response audio amplifier.This qin range is wide, give great volume, tonequality is pure, have a beautiful tone, and expressive force is abundant, can play the musical works of various subject matters, is comparatively ideal solo, musical instrument accompaniment.But this device fails to solve effectively for the phase interference and the sound problem of short-circuit of different frequency sound, and the acoustic pressure skewness of different frequency, high-frequency sound and low-frequency sound still are easy to sound muddiness, unintelligible occur, even the phenomenon of audio distortions.
Summary of the invention
The objective of the invention is acoustic pressure skewness to existing digital piano different frequency; Sound phase interference and sound problem of short-circuit fail better to be solved; Defective that acoustical quality is not good and deficiency; Provide a kind of simple in structure, the acoustic pressure of different frequency is evenly distributed, the digital sound-producing device of the upright piano that acoustical quality is good.
For realizing above-mentioned purpose, technical solution of the present invention is: the digital sound-producing device of upright piano comprises the piano body; Loudspeaker, the rear portion of piano body are hollow box body, the sound boxboard of horizontally set in the hollow box body of said piano rear body; The sound boxboard is separated into two audio amplifiers up and down with hollow box body, and top audio amplifier is a high frequency sound case, and following audio amplifier is the all-bottom sound case; Vertically be provided with dividing plate on the length direction in the all-bottom sound case, two sound casings about dividing plate is divided into the all-bottom sound case, symmetry offers two bellmouth orifices on the length direction of sound boxboard; Loudspeaker all are installed in each bellmouth orifice; And the cone mouth of loudspeaker is upwards, and two loudspeaker are connected with the sounding controller respectively, on the backboard wall of all-bottom sound case about correspondence two sound casings offer pilot hole respectively.
The ratio of the sound of said all-bottom sound case and volume size is: 9 decibels: 10 cubic decimeters.
The volume of two sound casings of said all-bottom sound case is identical, and two loudspeaker are the high magnetic horn of the identical full range of power.
The volume of two sound casings of said all-bottom sound case is: long 699 millimeters, wide 304 millimeters, high 518 millimeters, the distance between two loudspeaker is 800 millimeters.
Described pilot hole is the oval hole.
The invention has the beneficial effects as follows:
1. employing sound boxboard of the present invention has been divided into high frequency sound case and the all-bottom sound case arranged up and down with the hollow box body of piano rear body; And utilize dividing plate that the all-bottom sound case has been divided into two casings; Low-frequency sound phase interference and low-frequency sound problem of short-circuit have effectively been solved; On the backboard wall of two sound casings about the all-bottom sound case, offer a pilot hole respectively; The acoustic pressure of different frequency is evenly distributed, can when sound is very big, play antihunt action, tonequality is very thin, well arranged to have Ambience.
2. the sound tonequality sent of the present invention is good, muddiness can not occur, and piano sound is simple and honest, bright, fine and smooth, clear; High pitch is more clear, bright, and high pitch and bass are well arranged simultaneously, also do not lose the simple and honest of bass; The tone color reduction effect is good, can give the hearer strong sense of hearing shock.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: piano body 1, high frequency sound case 2, all-bottom sound case 3, loudspeaker 4, dividing plate 5, pilot hole 6, sounding controller 7, sound boxboard 8.
Embodiment
Below in conjunction with description of drawings and embodiment the present invention is made further detailed description:
Referring to Fig. 1, the digital sound-producing device of upright piano of the present invention comprises piano body 1; Loudspeaker 4, the rear portion of piano body 1 are hollow box body, the sound boxboard 8 of horizontally set in the hollow box body at said piano body 1 rear portion; Sound boxboard 8 is separated into two audio amplifiers up and down with hollow box body, and top audio amplifier is a high frequency sound case 2, and following audio amplifier is an all-bottom sound case 3; Vertically be provided with dividing plate 5 on the length direction in the all-bottom sound case 3, two sound casings about dividing plate 5 is divided into all-bottom sound case 3, symmetry offers two bellmouth orifices on the length direction of sound boxboard 8; Loudspeaker 4 all are installed in each bellmouth orifice; And the cone mouth of loudspeaker 4 is upwards, and two loudspeaker 4 are connected with sounding controller 7 respectively, on the backboard wall of all-bottom sound case 3 about correspondence two sound casings offer pilot hole 6 respectively.
The ratio of the sound of said all-bottom sound case 3 and volume size is: 9 decibels: 10 cubic decimeters.
The volume of two sound casings of said all-bottom sound case 3 is identical, and two loudspeaker 4 are the high magnetic horn of the identical full range of power.
The volume of two sound casings of said all-bottom sound case 3 is: long 699 millimeters, wide 304 millimeters, high 518 millimeters, the distance between two loudspeaker 4 is 800 millimeters.
Described pilot hole 6 is the oval hole.
The inner chamber middle part of piano body 1 is provided with sound boxboard 8; All-bottom sound case 3 is installed in the lower end of boxboard 8; The dividing plate 5 that the inner chamber middle part of all-bottom sound case 3 vertically is provided with; Two isopyknic casees about being used for all-bottom sound case 3 is separated into are isolated two sound channels, and the degree of depth, range that the front and back sound wave discharges are inequality.Dividing plate 5 is a high-density plate, makes high-frequency sound and not mutual interference mutually of low-frequency sound also effectively to have solved low-frequency sound phase interference and low-frequency sound problem of short-circuit.The lower end of all-bottom sound case 3 is fixed on the cavity that is provided with on piano body 1 base plate, helps the buffer action of all-bottom sound case 3 voiced processes to vibrations.
Above two loudspeaker 4, be provided with high frequency sound case 2; The cone opening of loudspeaker 4 faces high frequency sound case 2; Be used to produce high-frequency sound; Because high-frequency sound has directivity, so high frequency sound case 2 inside need not be provided with dividing plate and separate, and the high-frequency sound that high frequency sound case 2 sends spreads out of from the opening part of high frequency sound case 2 upper ends.All-bottom sound case 3 is after dividing plate 5 separates, and the length in space was 699 millimeters in it was single, and wide is 304 millimeters, and height is 518 millimeters.When two loudspeaker 4 are the high magnetic horn of full range of model of the same race, the volume equal and opposite in direction of two sound casings of all-bottom sound case 3.The sound casing is long-pending suitablely could to make that sound is simple and honest, is provided with pilot hole 6 and position, hole size is correct, and sound just can be very bright, and acoustical quality is desirable.The ratio of the sound of all-bottom sound case 3 and volume size is: 9 decibels: 10 cubic decimeters, can reach best sounding effect this moment.
Claims (5)
1. the digital sound-producing device of upright piano comprises piano body (1), loudspeaker (4); The rear portion of piano body (1) is a hollow box body; It is characterized in that: the sound boxboard of horizontally set (8) in the hollow box body at said piano body (1) rear portion, sound boxboard (8) is separated into two audio amplifiers up and down with hollow box body, and top audio amplifier is a high frequency sound case (2); Following audio amplifier is all-bottom sound case (3); Vertically be provided with dividing plate (5) on the length direction in the all-bottom sound case (3), two sound casings about dividing plate (5) is divided into all-bottom sound case (3), symmetry offers two bellmouth orifices on the length direction of sound boxboard (8); Loudspeaker (4) all are installed in each bellmouth orifice; And the cone mouth of loudspeaker (4) is upwards, and two loudspeaker (4) are connected with sounding controller (7) respectively, on the backboard wall of all-bottom sound case (3) about correspondence two sound casings offer pilot hole (6) respectively.
2. the digital sound-producing device of upright piano according to claim 1 is characterized in that: the ratio of the volume of said all-bottom sound case (3) and volume size is: 9 decibels: 10 cubic decimeters.
3. the digital sound-producing device of upright piano according to claim 1, it is characterized in that: the volume of two sound casings of said all-bottom sound case (3) is identical, and two loudspeaker (4) are the high magnetic horn of the identical full range of power.
4. the digital sound-producing device of upright piano according to claim 3, it is characterized in that: the volume of two sound casings of said all-bottom sound case (3) is: long 699 millimeters, wide 304 millimeters, high 518 millimeters, the distance between two loudspeaker (4) is 800 millimeters.
5. the digital sound-producing device of upright piano according to claim 1 is characterized in that: described pilot hole (6) is the oval hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100451642A CN102110434B (en) | 2011-02-25 | 2011-02-25 | Digital sound production device of vertical piano |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100451642A CN102110434B (en) | 2011-02-25 | 2011-02-25 | Digital sound production device of vertical piano |
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| CN102110434A CN102110434A (en) | 2011-06-29 |
| CN102110434B true CN102110434B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100451642A Active CN102110434B (en) | 2011-02-25 | 2011-02-25 | Digital sound production device of vertical piano |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017121049A1 (en) | 2016-01-15 | 2017-07-20 | Findpiano Information Technology (Shanghai) Co., Ltd. | Piano system and operating method thereof |
| CN106981279B (en) * | 2016-01-15 | 2020-02-07 | 森兰信息科技（上海）有限公司 | Piano sound compensation method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5335283A (en) * | 1992-03-24 | 1994-08-02 | Kabushiki Kaisha Kawai Gakki Seisakusho | Loudspeaker apparatus for electronic keyboard musical instrument |
| EP1837853A1 (en) * | 2006-03-20 | 2007-09-26 | Yamaha Corporation | Musical instrument having controller exactly discriminating half-pedal and controlling system used therein |
| CN101770771A (en) * | 2008-12-26 | 2010-07-07 | 雅马哈株式会社 | Electronic keyboard instrument |
| CN101826323A (en) * | 2009-03-06 | 2010-09-08 | 雅马哈株式会社 | Acoustic construction |
| CN202025524U (en) * | 2011-02-25 | 2011-11-02 | 湖北华都钢琴制造有限公司 | Digital sound emitting device of upright piano |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7479591B2 (en) * | 2006-08-30 | 2009-01-20 | Wheeler Ray L | Mobile music entertainment systems |
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- 2011-02-25 CN CN2011100451642A patent/CN102110434B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5335283A (en) * | 1992-03-24 | 1994-08-02 | Kabushiki Kaisha Kawai Gakki Seisakusho | Loudspeaker apparatus for electronic keyboard musical instrument |
| EP1837853A1 (en) * | 2006-03-20 | 2007-09-26 | Yamaha Corporation | Musical instrument having controller exactly discriminating half-pedal and controlling system used therein |
| CN101770771A (en) * | 2008-12-26 | 2010-07-07 | 雅马哈株式会社 | Electronic keyboard instrument |
| CN101826323A (en) * | 2009-03-06 | 2010-09-08 | 雅马哈株式会社 | Acoustic construction |
| CN202025524U (en) * | 2011-02-25 | 2011-11-02 | 湖北华都钢琴制造有限公司 | Digital sound emitting device of upright piano |
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| CN102110434A (en) | 2011-06-29 |
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