JPS6339758Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention consists of a wind instrument using electrical means.
The aim is to provide an electric musical instrument that anyone can easily play.

For example, in a wind instrument such as a trumpet, the frequency of sound is determined by the tightness of the lips applied to the mouthpiece and the length of the acoustic path selected by the valve mechanism. The valve mechanism is composed of three pistons, and the combination of the three pistons in the upper and lower positions can produce a sound range of about three octaves. Therefore, depending on the combination of the upper and lower positions of the piston, different octaves of sound can be produced, and depending on the tightness of the lips, different octaves of sound can be selected. Therefore, it takes a considerable amount of practice to be able to make this choice arbitrarily, and it is not something that anyone can do easily.

The same is true not only for trumpets but also for other wind instruments, and even for reed instruments such as clarinet and saxophone, it is difficult to tighten the lips as the scale goes up.

The purpose of this invention is to provide a wind-type electric instrument that anyone can easily play.

In this device, the sound emitted from the mouthpiece is converted into an electrical signal, and the electrical signal is selected by a variable filter that can change according to the frequency of the musical scale. By vibrating the mouthpiece, the lips are vibrated at that frequency, and the sound at that frequency is automatically produced.

An embodiment of this invention will be described below in detail with reference to the drawings.

This example shows the case of wind instruments. That is, in FIG. 1, numeral 1 indicates a mouthpiece of a wind instrument. Here, this mouthpiece 1 will be referred to as a vibrating body. Lips 2 are applied to the vibrating body 1 to allow exhaled air 3 to pass therethrough. At this time, depending on the tightness of the lips 2, a sound of a certain frequency is produced. This sound is captured by a microphone 4, amplified by an amplifier 5, and supplied to a variable filter 6. The variable filter 6 is a variable band filter whose passing frequency can be varied by the frequency pitch of a musical scale, and the selection of the passing frequency can be made by, for example, a keyboard such as a piano or an organ. The characteristics of the variable filter 6 are 2f, 3f, 4f, 5f with respect to the fundamental frequency as shown in FIG.
It has a so-called comb-shaped frequency characteristic that allows f to pass through. Such a comb-shaped variable filter can be constructed, for example, by a packet precade delay element or a combination of a variable phase shifter and an adder.

The signal of the frequency selected by the variable filter 6 is supplied to a gain control amplifier 7 as necessary, for example.
The amplified output is supplied to the loudspeaker 8 and the speaker 9
It is emitted as a sound. The gain control amplifier 7 can be configured such that, for example, its amplification degree is controlled in proportion to the detection signal of the breath detector 11, and a signal having a level proportional to the amount of breath is input to the loudspeaker 8. Reference numeral 12 denotes an amplifier for amplifying the detection signal of the breath detector 11.

On the other hand, reference numeral 13 indicates a driving means for vibrating the vibrating body 1 at a frequency selected by the variable filter 6. This driving means 13 can be constituted by, for example, a magnetostrictive vibrating element or an electrostrictive vibrating element using a piezo effect or the like. This example shows a case where a magnetostrictive vibrating element is used. A magnetostrictive vibrating element is a coil wound around an iron core, and by applying an alternating current signal to this coil,
This magnetostrictive vibrating element utilizes the phenomenon in which an iron core expands and contracts at the frequency of the alternating current signal, and is generally well known as an ultrasonic vibrating element.

By configuring as described above, the variable filter 6 can detect the fundamental frequency and its harmonics 2f, 3f, . . .
When exhalation 3 is passed through the vibrating body 1 and a certain sound is generated with the selected state, the frequencies 2f, 3f,
. . . signals are taken out and supplied to the driving means 13. Therefore, the vibrating body 1 vibrates at the passing frequency of the variable filter 6, 2f, 3f, . . . , and the vibration of the vibrating body 1 is fed back to the lips 2. Therefore, the lips 2 vibrate at their driving frequencies 2f, 3f, . is emitted from the speaker 9.

Therefore, according to this invention, it is possible to easily play the sounds of frequencies 2f, 3f, . . . selected by the variable filter 6. Therefore, anyone can easily play a wind instrument.

In the above description, the vibrating body 1 is exemplified by the mouthpiece of a wind instrument, but the present invention can also be applied to the mouthpiece of a reed instrument such as a clarinet or saxophone. When this invention is applied to the mouthpiece of a reed instrument, it is sufficient to configure the reed to vibrate at the frequency selected by the variable filter 6 using the driving means 13, and the other configuration is the same as in the case of FIG. 1. The same is true.

Furthermore, although the case where the gain control amplifier 7 is inserted has been described above, the gain control amplifier 7 is not necessarily necessary because the sound emitted from the vibrating body 1 is proportional to exhalation. Furthermore, the output of the gain control amplifier 7 is directly supplied to the loudspeaker 8 and emitted as sound from the speaker 9. However, a synthesizer is built into the loudspeaker 8, and the electrical signal obtained from the gain control amplifier 7 is converted into a waveform. It is also possible to perform processing such as shaping so as to emit a sound of a desired tone.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of this invention, and FIG. 2 is a graph showing an example of the characteristics of a variable filter used in an electric musical instrument of this invention. 1: Vibrating body, 4: Microphone, 6: Variable filter, 8: Loudspeaker, 13: Driving means.

Claims (1)

[Scope of utility model registration request] A vibrating body that vibrates with exhaled air from the lips, a microphone that converts the sound emitted from this vibrating body into an electrical signal, a comb-shaped variable filter to which the electrical signal output from the microphone is input, and the variable filter. An electric musical instrument comprising: amplification means for emitting an electric signal outputted from the filter as sound; and a driving means for vibrating the vibrating body using the electric signal outputted from the variable filter.