JPS6022900A - Digital speaker device - Google Patents

Abstract

PURPOSE:To improve the performance of a digital speaker by causing air displacement directly without the use of a diaphragm to produce sound. CONSTITUTION:When a digital signal is applied to a signal input terminal 15, a heater 13 is heated and a medium 12 is heated. When air is used for the medium 12, the air is expanded simply and when water is used as the medium 12, vaporized bubbles are generated near the heater 13 and the water is moved by the pressure. When lots of speaker elements 13 as above are stacked, weighting is given to signal input terminals 151, 152... in response to each digit of the digital signal and they are connected mutually, then sound is produced from the nozzles of a prescribed number in response to the digital signal input at each smapling frequency. The digital signal is restored into a conventional analog waveform by adding the sound at an acoustic system.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a speaker that reproduces analog sound by directly applying a digital signal by causing a volume change of gas or liquid in a nozzle due to the action of thermal energy. Regarding equipment.

[Technical history of the invention and its problems]

2. Description of the Related Art Conventionally, there is a digital speaker device as shown in FIG. 1 as a speaker device that reproduces analog sound by directly applying a digital signal. That is, yoke 1 and center 2 - rule 2
A voice coil winding frame 4 connected to the diaphragm 3 is provided between the
The voice coil winding frame 4 is fully wound with a plurality of voice coils 401, 402 with different winding ratios, and each voice coil 401, 402... has an input terminal 501, 502,
Voice coils 401, 402 to which a digital signal is applied and weighted according to the turns ratio are added to the diaphragm 3.
is driving and playing analog editions.

However, such a digital speaker device uses an electrodynamic speaker and uses the conventional i-sound principle of weighting by 9 weights depending on the turn ratio of the voice coil. It was a good idea to have an inherent advantage over the others.

[zu1. Purpose of Ming] Honza 13 Ming was created in response to the above circumstances, and it uses a completely different sounding principle from the conventional one, and produces sound by creating a displacement in the air in contact with 1ρ, without using a diaphragm. The purpose is to provide 11 digital speaker devices.

[Summary of II Shimei]

The present invention kl-1 integrates a large number of elements that cause the gas or 1lSi liquid in the nozzle to change body 4f due to the action of thermal energy, and
(1) A digital speaker device that detects the name of an ordinary analog signal by inputting a digital signal.

[Embodiments of the present invention] Examples of the present invention will be described in detail below with reference to page 1M1.

2 to 4 show an embodiment of the present invention.

That is, FIG. i2 shows a speaker element, and the nozzle 11 is formed so that the opening becomes gradually smaller, and the medium 12 is placed inside. This medium 12 is a gas such as air or a liquid such as water. A heating element 13 that generates heat when electric power is applied is provided on the outer surface of the nozzle 11, and this heating element 13 is connected to the output end of a force applying device 14 that applies electric power to the heating element 13 when a signal is received. A signal input terminal 15 is connected to the input end of this power application device 14.
is connected.

FIG. 3 shows a configuration in which a large number of speaker elements 13 shown in FIG. 2 are integrated, and in this case, as shown in FIG. For each block, each digit MSB (the Mo5t 5
1gn1ficantBit ) ~LSB (the
Least 51gn1flcant Bit) is now supported. Each block of the speaker element 13 has a power application device 141, 142--...
Signal input terminals 151, 152, . . . are provided through the terminals.

That is, the signal input terminal 1 in FIG. When digital signal No. 8 is applied to -15, pressure is applied to body 13, and force is applied to body 13.
3 is an emission π5°L t, #Il: When the body 12 is heated and the medium 12 is heated, if the body 12 is air, it simply expands, or if it is water, it becomes a heating element. Vaporized bubbles are generated near the speaker element 13, and the resulting pressure causes the air to vibrate directly and generate sound.A large number of such speaker elements 13 are stacked together as shown in Figure 3. , and as shown in FIG. 4, if the signal input &:, quintuplets 151, 152, etc. are weighted by, for example, 2n, and the result is calculated according to each digit of the digital signal, D1 according to the dezotal signal input for each sampling frequency
A fixed number of nine nozzles are emitted, and by adding these in an acoustic system, D/A conversion is performed and a normal analog waveform is restored.

As described above, according to the present invention, it is possible to realize a speaker device that directly applies a digital signal based on a sound generation principle completely different from the conventional one.

FIG. 5 shows another embodiment of the present invention, in which a thin film 16 of a polymer compound or the like is provided at the opening of the nozzle 11 shown in FIG. This prevents the liquid from spilling into the wall, and generates sound due to the displacement of the thin film 16 due to changes in the volume of the liquid.

FIG. 6 shows still another embodiment of the present invention, in which a gas such as Freon gas is used as a medium in the nozzle 11 shown in FIG.
It has a structure with 7. When '#im' is applied in this way, a digital signal is applied, and for example, Freon gas is heated and vaporized, and when the gas pushes the air, it makes a sound, but when the vaporized gas reaches the outlet of the nozzle 11, it is cooled and liquefied. Therefore, it is possible to prevent the water from flowing out of the nozzle 1].

Note that in the speaker device configured as in the above embodiment, control of the sound R] by the applied voltage (or direct current) is limited depending on the method.

However, the volume can be controlled by changing the number of speaker elements allocated per number of digits of the input digital signal.

Further, in the above embodiment, instead of the heating element, the position of the heating element of the nozzle may be used as the focal position of the laser beam, and the laser beam may be controlled by a digital signal.

Furthermore, efficiency may be improved by connecting a horn to the outlet of the nozzle of the above embodiment.

〔Effect of the invention〕

As described above, according to the present invention, the sound generation principle is completely different from the conventional one in that the gas or liquid in the nozzle changes its body due to the action of thermal energy, and the sound generation principle is completely different from the conventional one. 'lA digital speaker that produces sound by creating a displacement in the air? i i? You can also capture 7.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a conventional digital speaker device, Figs. 2 to 4 are block diagrams showing one embodiment of the present invention, and Figs. 5 and 6 show other embodiments of the present invention. FIG. DESCRIPTION OF SYMBOLS 11... Nozzle, 12... Medium, 13... Heating element, 14... Power application device, 15... Signal input terminal.

Claims (2)

[Claims] (1) A medium stronger than gas or liquid is put into a nozzle having 11 openings, and a volume change is caused by the action of thermal energy in the medium, causing a sudden displacement to create a speaker element that produces sound. The f? 7J Notaruspei Riki Sosho, which is characterized by li. (2) As a nozzle, use 'Ih I&!' at the opening. Claims *1 characterized by using a nozzle provided with
．． Digital speaker device according to item 1@: 0(3) Patent d Aoki no n;1'' Box 8I!, characterized in that a nozzle having a cooling section provided at the opening is used as the nozzle. The digital speaker device according to item 1.