JPS59146296A - Driving method of piezoelectric speaker - Google Patents
Driving method of piezoelectric speakerInfo
- Publication number
- JPS59146296A JPS59146296A JP2041183A JP2041183A JPS59146296A JP S59146296 A JPS59146296 A JP S59146296A JP 2041183 A JP2041183 A JP 2041183A JP 2041183 A JP2041183 A JP 2041183A JP S59146296 A JPS59146296 A JP S59146296A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- resistance
- characteristic
- frequency
- piezoelectric
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
- B06B1/0276—Driving circuits for generating signals continuous in time for generating multiple frequencies with simultaneous generation, e.g. with modulation, harmonics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/50—Application to a particular transducer type
- B06B2201/55—Piezoelectric transducer
Abstract
Description
【発明の詳細な説明】 本発明はｒｌ−電スビーカの駆動方法に関する。[Detailed description of the invention] The present invention relates to a method for driving an RL-electronic beaker.
一般に、圧電スピーカは、Ｐ／王などの圧電セラミック
扱を金属板なとの振動板に貼り合わけた圧電パイセルフ
板にコーン紙を取り付け、圧電バイモルフ板の屈曲振動
を」−ン紙に伝え、」−ン紙から音を出１ようにしたも
の、あるいは、圧電バイモルフ板を振動膜に貼り付ＩＪ
Ｔ振動膜を圧電バイモルフ板とともに屈曲振動させ、
振動膜から青を出−４ようにしたものなどがある。In general, piezoelectric speakers are made by attaching cone paper to a piezoelectric pie-cell plate made of a piezoelectric ceramic such as P/O bonded to a metal plate or other diaphragm, and transmitting the bending vibrations of the piezoelectric bimorph plate to the diaphragm. ” - IJ with a piece of paper that emits sound, or a piezoelectric bimorph plate pasted on a vibrating membrane.
The T-vibration membrane is made to vibrate in flexure together with the piezoelectric bimorph plate,
There are some that emit blue light from the vibrating membrane.
このような圧電スピーカは、圧電効果特有の共振のＱが
高く、しかも高調波振動が多く発生するため、音ｊ十−
周波数特性上の高音域にあい′Ｃ鋭いピークが多くあら
れれる。したがって、音質は高音が鋭く、キンキンした
音になり、普通のスピーカとして用いる場合好ましくな
いものであった。Such a piezoelectric speaker has a high resonance Q characteristic to the piezoelectric effect, and also generates a lot of harmonic vibration, so the sound
There are many sharp peaks in the high frequency range of the frequency characteristics. Therefore, the sound quality was sharp and harsh in the high tones, which was undesirable when used as an ordinary speaker.
また、音声合成機器に圧電スピーカを使用した場合、音
声合成用し８１で形成される音声信号の高調波成分を強
く再生し、場合によつ−Ｃはハイカットフィルタを挿入
して音声信号の高調波成分を除去しなければならなかっ
た。In addition, when a piezoelectric speaker is used in a speech synthesis device, the harmonic components of the speech signal formed by the speech synthesis device 81 are strongly reproduced, and in some cases, a high-cut filter is inserted to reproduce the harmonic components of the speech signal. The wave component had to be removed.
上述した圧電スピーカの問題点Ｇ３二対しては、圧電ス
ピーカ自身やその周辺回路にいろいろな１７大を施し、
改善しようと試みているが、いまだ１−分な結果は得ら
れていない。To solve the problem G32 of the piezoelectric speaker mentioned above, we applied various 17 problems to the piezoelectric speaker itself and its peripheral circuits.
I'm trying to improve it, but I still haven't gotten a 1-minute result.
本発明は、圧電スピーカの駆動方法から上述した問題点
を改良しようとしたものであり、ハイカットフィルタな
どを用いることなく、簡単な手段て′もって、高域側の
ピークを効果的に抑佳しで、まろやかな音を再生できる
ようにした、圧電スピーカの駆動方法を提供覆ることを
目的どする。The present invention is an attempt to improve the above-mentioned problems in the method of driving a piezoelectric speaker, and uses simple means to effectively suppress the peak on the high frequency side without using a high-cut filter or the like. The aim is to provide a method for driving a piezoelectric speaker that can reproduce mellow sound.
すなわち本発明は、圧電スピーカのインピーダンス特性
が容量性のため周波数に対して負の特性をもら、しかも
Ｉｔ ｔｌｊスピーカが電汀駆動型であることに着目し
、これらの特性を利用し−Ｃ１圧電スピーカど直列に抵
抗を挿入し−Ｃ駆動り−るという、きわめて簡単４１手
段により上記目的を達成したものである。That is, the present invention focuses on the fact that the impedance characteristic of a piezoelectric speaker is capacitive and therefore has a negative characteristic with respect to frequency, and that the It tlj speaker is an electric drive type. The above object has been achieved by an extremely simple means of inserting a resistor in series with the speaker and driving it by C.
以下、本発明の実施例を図面を参照しつつ訂）ホする。Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の駆動方法を説明するための図であり、
同図においで、１は圧電セラミックスピーカで、このス
ピーカ １と直列に抵抗２が挿入され、この直列抵抗２
を介してスピーカ １の両端に駆動回路３が接続されて
いる。駆動回路３からの信号は、直列抵抗２を通してス
ピーカ １に印加されるのＣ１直列抵抗２とスピーカ
１のインピーダンスとＣ′分割され、分割された電圧に
よりスピーカ １が駆動される。FIG. 1 is a diagram for explaining the driving method of the present invention,
In the figure, 1 is a piezoelectric ceramic speaker, and a resistor 2 is inserted in series with this speaker 1.
A drive circuit 3 is connected to both ends of the speaker 1 via. The signal from the drive circuit 3 is applied to the speaker 1 through the series resistor 2.
1 impedance and C', and the speaker 1 is driven by the divided voltage.
一方、圧電セラミックスピーカ １のインピータンスは
容量性を呈し、その周波数特性は、第２図に示づように
、周波数が高くなるにつれてインピーダンスが低下して
いく、負特性を示すものである。したかつ−（、圧電セ
ラミックスビ・−力 １にかかる電圧は、周波数が高く
なるにつれて低下し、それに応じて合圧レベルも抑圧さ
れる。On the other hand, the impedance of the piezoelectric ceramic speaker 1 exhibits capacitance, and its frequency characteristics exhibit negative characteristics in which the impedance decreases as the frequency increases, as shown in FIG. The voltage applied to the piezoelectric ceramic beam 1 decreases as the frequency increases, and the combined pressure level is suppressed accordingly.
直列抵抗２の値は、ひとつの目安として小製周波数帯域
の下限周波数ｆ１でのＬ「電しラミックスピーカのイン
ピーダンスと同等に設定（るとよい。As a guideline, the value of the series resistor 2 should be set to be equal to the impedance of the L-electronic ceramic speaker at the lower limit frequency f1 of the small frequency band.
この場合、１．Ｆ電しラミックスピー力の各周波数で・
の音圧レベルの減衰量は表１のようになる。表１から明
らかなように、周波数が高くなるとともに減衰量も大幅
に低下していく。In this case, 1. At each frequency of the F electric power,
The amount of attenuation of the sound pressure level is shown in Table 1. As is clear from Table 1, as the frequency increases, the amount of attenuation also decreases significantly.
具体的には、不要周波数が４ Ｋ ＋−１７以上で、圧
電レジミックスピーカの４ＫＨ２でのインピーダンス値
が２５０Ωどづると、２５０Ωイ」近の抵抗値をもつ抵
抗２を接続づる。この場合のＭ Ｉｔ−周波数特性は、
第３図にａ３ ｌｅする特性ａのようになる。実際には
、抵抗２を挿入して得られる音圧−周波数特性と所望の
周波数特性とを比較しながら抵抗値を調節して、最終的
な抵抗値を設定していく。第３図において、抵抗値を小
さくしていくど、特性すのようになり、逆に、抵抗値を
大きくしでいくと、特性Ｃのようになる。特性（ｊは抵
抗２を接続しない、従来の方法で圧電セラミックスピー
カを駆動した場合の特性を示している。Specifically, if the unnecessary frequency is 4K+-17 or higher and the impedance value of the piezoelectric remix speaker at 4KH2 is 250Ω, a resistor 2 having a resistance value close to 250Ω is connected. The M It-frequency characteristic in this case is
The characteristic a shown in FIG. 3 is a3 le. In reality, the final resistance value is set by adjusting the resistance value while comparing the sound pressure-frequency characteristics obtained by inserting the resistor 2 with the desired frequency characteristics. In FIG. 3, as the resistance value is decreased, the characteristic becomes as shown in C. Conversely, as the resistance value is increased, the characteristic becomes as shown in C. Characteristics (j shows the characteristics when the piezoelectric ceramic speaker is driven by the conventional method without connecting the resistor 2.
第３図から明らかなように、本発明に基い−（抵抗２を
１個挿入するという簡単な手段でもって、高域側の音
圧レベルを下げ、特に高調波のピークを大幅に抑圧でき
、まろやかな音を再生することが可能となる。しかも、
その抵抗の値を変えるだＧフ℃、ｌＯＩ域側の周波数特
性の傾斜を所望値に合わせて調整４ることもできる。ま
た、音声合成機器に使用する場合は、通常挿入づ−るハ
イカットフィルターが不要となる。As is clear from Fig. 3, based on the present invention, the sound pressure level on the high frequency side can be lowered, and especially the harmonic peaks can be significantly suppressed by simply inserting one resistor 2. , it becomes possible to reproduce mellow sounds.Moreover,
By changing the value of the resistor, the slope of the frequency characteristic on the IOI region side can be adjusted to a desired value. Furthermore, when used in speech synthesis equipment, there is no need for a high-cut filter that is normally inserted.
第１図は本発明の一実施例を説明づるための図、第２図
は本発明の説明に用いる圧電レラミックスビー力のイン
ピータンス−周波数特性図、第３図は従来および本発明
に基づく圧電セラミックスピーカの音圧レベルー周波数
特性図である。
１は圧電セラミックスピーカ、２は抵抗、３はスピーカ
駆動回路である。
特 許 出 願 人
株式会社祠（（１製作所
第１図
う ？
第７図
第５Ｉ火１
５７５−Fig. 1 is a diagram for explaining one embodiment of the present invention, Fig. 2 is an impedance-frequency characteristic diagram of piezoelectric ceramic bee force used to explain the present invention, and Fig. 3 is a diagram based on the conventional and the present invention. FIG. 3 is a sound pressure level-frequency characteristic diagram of a piezoelectric ceramic speaker. 1 is a piezoelectric ceramic speaker, 2 is a resistor, and 3 is a speaker drive circuit. Patent application Hito Co., Ltd. ((1 Manufacturing Company Figure 1 U? Figure 7
Claims (1)
圧電スピーカを駆動するようにしたことを特徴と−４−
るＹ［電スピーカの駆動方法。A resistor is inserted in series with the piezoelectric speaker, and C
-4- The feature is that it drives a piezoelectric speaker.
Y [How to drive an electric speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2041183A JPS59146296A (en) | 1983-02-08 | 1983-02-08 | Driving method of piezoelectric speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2041183A JPS59146296A (en) | 1983-02-08 | 1983-02-08 | Driving method of piezoelectric speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59146296A true JPS59146296A (en) | 1984-08-22 |
Family
ID=12026290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2041183A Pending JPS59146296A (en) | 1983-02-08 | 1983-02-08 | Driving method of piezoelectric speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59146296A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021694A (en) * | 1983-07-18 | 1985-02-04 | Nippon Telegr & Teleph Corp <Ntt> | Piezoelectric receiver |
| WO1999005886A1 (en) * | 1997-07-23 | 1999-02-04 | Shinsei Corporation | Hybrid loudspeaker system |
| WO2007119362A1 (en) | 2006-03-22 | 2007-10-25 | Nec Corporation | Audio circuit |
| JP2008306270A (en) * | 2007-06-05 | 2008-12-18 | Yamaha Corp | Power amplifying circuit |
| JP2008306269A (en) * | 2007-06-05 | 2008-12-18 | Yamaha Corp | Power amplifying circuit |
| WO2009060557A1 (en) * | 2007-11-07 | 2009-05-14 | Panasonic Corporation | Signal amplifying device and acoustic system |
| JP6308696B1 (en) * | 2016-12-28 | 2018-04-11 | 株式会社Ｃｒｉ・ミドルウェア | Audio playback device |
| JP6308705B1 (en) * | 2017-03-21 | 2018-04-11 | 株式会社Ｃｒｉ・ミドルウェア | Audio playback device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410919U (en) * | 1977-06-24 | 1979-01-24 |
-
1983
- 1983-02-08 JP JP2041183A patent/JPS59146296A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410919U (en) * | 1977-06-24 | 1979-01-24 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021694A (en) * | 1983-07-18 | 1985-02-04 | Nippon Telegr & Teleph Corp <Ntt> | Piezoelectric receiver |
| JPH0354520B2 (en) * | 1983-07-18 | 1991-08-20 | ||
| WO1999005886A1 (en) * | 1997-07-23 | 1999-02-04 | Shinsei Corporation | Hybrid loudspeaker system |
| WO1999005885A1 (en) * | 1997-07-23 | 1999-02-04 | Shinsei Corporation | Loudspeaker system |
| WO2007119362A1 (en) | 2006-03-22 | 2007-10-25 | Nec Corporation | Audio circuit |
| US8081779B2 (en) | 2006-03-22 | 2011-12-20 | Nec Corporation | Audio circuit |
| JP2008306269A (en) * | 2007-06-05 | 2008-12-18 | Yamaha Corp | Power amplifying circuit |
| JP2008306270A (en) * | 2007-06-05 | 2008-12-18 | Yamaha Corp | Power amplifying circuit |
| WO2009060557A1 (en) * | 2007-11-07 | 2009-05-14 | Panasonic Corporation | Signal amplifying device and acoustic system |
| JP6308696B1 (en) * | 2016-12-28 | 2018-04-11 | 株式会社Ｃｒｉ・ミドルウェア | Audio playback device |
| WO2018123730A1 (en) * | 2016-12-28 | 2018-07-05 | 株式会社Ｃｒｉ・ミドルウェア | Audio reproduction device |
| JP6308705B1 (en) * | 2017-03-21 | 2018-04-11 | 株式会社Ｃｒｉ・ミドルウェア | Audio playback device |
| WO2018173426A1 (en) * | 2017-03-21 | 2018-09-27 | 株式会社Ｃｒｉ・ミドルウェア | Sound reproduction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4983171B2 (en) | Electrostatic transducer, capacitive load drive circuit, circuit constant setting method, ultrasonic speaker, and directional acoustic system | |
| JP4793174B2 (en) | Electrostatic transducer, circuit constant setting method | |
| US6606389B1 (en) | Piezoelectric film sonic emitter | |
| EP1422970B1 (en) | Transducer of the piezo-electric type | |
| CN1295735A (en) | Capacitor-less crossover network for electro-acoustic loudspeakers | |
| US7447322B2 (en) | Speaker having a transparent panel | |
| JPS59146296A (en) | Driving method of piezoelectric speaker | |
| US20180255397A1 (en) | A method of an audio signal correction | |
| CN203896502U (en) | Piezoelectric loudspeaker | |
| US1560502A (en) | Sound-reproducing device | |
| WO2006078247A1 (en) | Speaker having a transparent panel | |
| JPS623598A (en) | Driving method for piezoelectric speaker | |
| JP2000354297A (en) | Piezoelectric type speaker | |
| JPS62115996A (en) | Speaker | |
| US3143183A (en) | Direct radiator high fidelity loudspeaker | |
| JPS60214200A (en) | Piezoelectric electroacoustic transducer | |
| KR890003772B1 (en) | Piezo speaker | |
| KR900001031Y1 (en) | Piezo speaker | |
| JP2000253484A (en) | Speaker driving device and acoustic equipment provided with the same | |
| JPH0413916Y2 (en) | ||
| JPH1066193A (en) | Speaker and speaker unit using it | |
| RU2098923C1 (en) | Sound reproducing unit | |
| KR200140955Y1 (en) | Woofer | |
| JPH0129901Y2 (en) | ||
| JP2000197176A (en) | Composite speaker, its driver and acoustic device provided with them |