RU1839267C - Device for training vocalists - Google Patents

Abstract

The invention relates to teaching aids as well as to entertainment. The chain of the invention is to increase the reliability and accuracy of the device. The acoustic signal is fed to the input of the device, where it is converted into a sequence of rectangular pulses by an acoustic transducer. At the clock generation unit, a first clock is generated with the arrival of an N period of the input signal. If the time of occurrence of the first clock coincides with the time of arrival at the counter n of the clock period, the active level appears at the output of the register and the indicator light corresponding to the monitored note is lit. 3 id

Description

And YIJe otmfits to the educational device and toys and is intended for training in the correct singing of notes, rez - igi of musical hearing and entertainments.

The aim of the invention is to improve the accuracy and reliability of the device.

In FIG. 1 shows a device for training vocalists; in FIG. 2 - acoustic transducer; Fig. 3 is a clock generation unit.

The device for training vocalists includes an acoustic transducer 1, a clock generating unit 2, a clock 3, a counter 4, a decoder unit 5, a register 6 and an indicator 7.

The acoustic transducer contains an acoustic sensor 8, a strip amplifier 9 and a Schmidt trigger 10.

The clock generating unit 2 comprises in series a counter 11. a first inverter 12 and a second inverter 13.

The device operates as follows.

The acoustic signal in the acoustic transducer 1 is first converted to a sinusoidal, and then to a sequence of rectangular pulses. With the arrival of a No-ro (for example, N0 8) pulse to the clock generation unit 2, a first synchronization pulse is generated at its first output, and a second synchronization pulse is generated at the second output of the clock generation unit 2. Since the arrival of the first impulse

at the input of the synchronization pulse forming unit 2, before the occurrence of the leading edge of the first synchronization pulse, the counter 4 counts the clock pulses,

coming from a clock generator 3, With the arrival of a clock pulse with a pre-calculated number n0 at the corresponding output of block 5 of decoders, an active level is indicated, indicating

that at the inputs of decoder unit 5 there is a code pattern corresponding to the number n0. If the code combination corresponding to the number n0 is formed earlier or later than the front one

Since the front of the first clock, then the corresponding outputs of the decoder unit 5 have a pulse sooner or later than the leading edge of the synchronization pulse. In this case, in the corresponding bits

of register b, a passive level will be recorded, and the corresponding LED of indicator 7 will not light up, which will indicate a mismatch in the frequency of the input signal to the reference value. If

the code combination corresponding to the Po number appears simultaneously with the leading edge of the first clock pulse, the active level will be filled in register b, and the corresponding LED will light on indicator 7, indicating that the frequency of the input signal coincides with the reference value.

(56) Copyright certificate of the USSR No. 1819027, class C UN 1/02, 1987.

Claims (1)

The claims DEVICE FOR TRAINING VOCALISTS, comprising an acoustic transducer, a shaper of clock pulses, an indicator, a clock generator, the output of which is connected to the counter input of the counter. different in that. what. in order to increase the reliability and accuracy of the device, c) the register and block are eaten. decoders, the inputs of which are connected to the outputs of the counter, and the outputs - to the information inputs of the register, the outputs of which are connected to the information inputs of the indicator, and the recording input is connected to the first output of the clock generator, the second output of which is connected to the control input of the counter, and the input is connected to the output acoustic transducer. pЈ / c.f FIG. 2.