SU40000A1 - Device for measuring the frequency of sound vibrations - Google Patents

Description

P1) In accordance with the invention of the NLAS, there is a special diagram of a device for measuring, according to the beat method, the frequency of sound vibrations, and the musical instrument tone. A diagram of such a device is written in the attached drawing.

To the microphone L / „excited by a tuner for determination of tone ns“ with a sound meter, measure :) battery /: the battery is parallel to the input g) Г | Мого1 дпух трхьобмоточных and transformer, and 7 ,,. The second traits are transformed. At the same time, c, cs; 1 the same battery /: the newer coolervictpeipo i: m11cr0 (1ю1) am l / „and l / ,, n.h which micro |) it’s l / m excitement tone, as much as the commemoration tone is lower, as much higher as the commemoration tone, the M microphone, is the exciting microphone. The output windings of the transformers T and T., through the corresponding amplifiers Y „p Y are connected via switch / 7 or directly to the indicators, in particular to the neon lamps HJ7 ,, and L / L or to the input windings of the three-winding transformer Td, the outputN.WN of which is connected with the indicator, in particular with the neon lamHoii // D, ..

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At the lower nozhedechnl switch P, i.e., when the IDs of the Poison are turned on and HMV, as a result of interference of the test frequency with another equal to the frequency of the nominal top of the frequencies, beats appear optimal settings.

At the perch position of the PCC // key and mr voduvnuchennn mkrO () aa Af ,, nominal frequency, and the microphone L / - intended or vice versa, and the microphone L /, | it can be turned off, at the moment it is optimal by the moment: nacTpoiiKH beats bees, marked with an indicator // D, for example. neon lamp, which may be in the detector cascade. The optimal moment of the passer is noted with the termination of the beats, and in this case the neon lamp can go out of the current synphasis.

The subject matter of the invention.

A device for measuring the frequency of sound vibrations, characterized in that the microphone Mn, excited by measurement with my frequency, connects the inter-speaker1IO with one of the full windings-) 1v. trhcnbwdrwdt tforzformatorop, ico the second input windings of which the ir are connected to the microphones - to one L, excited by a frequency lower than that measured, and to another M, that excited by a higher frequency than the measured, the same output winding

formatorop, (w-ajla through the correlating statuses of the amplifier U „and U„, can be connected to the corresponding indicators, for example, neonopam lamps / DD, and f / JL, or

DNU y1 - single windings of the TS.X1 0 | mOTO1 transformer, to the output of the “small winding of which is at a glance indicator, for example, neon lamp // L.

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