Studying the Sound Pressure Working Standard with the Built-In Control Elements for the Condenser Microphones Verification

Abstract

The paper presents results of studying the sound pressure working standard for verification of the measurement microphones and the microphone condenser capsules with the built-in control elements making it possible to increase the measurement accuracy in determining frequency characteristics of the micro-phone sensitivity level and the interval between verifications of the standard used. The following disadvantages were identified based on experience in using the sound pressure working standards (VS-321 vibroacoustic measurement system) in the calibration laboratories practices and as a result of periodic annual verifications. They include reduced accuracy of the sound pressure measurements in the air and the error uncontrolled time drift in the interval between verifications due to the missing control of the time drift and taking into account the input channels error during operation; lack of accounting the generator uneven frequency response when testing the microphones with an electrostatic exciter (actuator), which affects the measurement accuracy; system insufficient noise immunity due to the external influencing factors in the form of extraneous noise; short (one year) interval between the system verifications. To eliminate these disadvantages, VS-321 vibroacoustic measuring system was studied using the built-in control elements to solve problems of increasing the measurement accuracy during verification and the system noise immunity by eliminating the external influencing factors in the form of extraneous noise, as well as to ensure possibility of increasing the interval between verifications

Please cite this article in English as:

Kuvykin Yu.А., Olkhovskiy A.N. Studying the sound pressure working standard with the built-in control elements for the condenser microphones verification. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2023, no. 4 (145), pp. 43--60 (in Russ.). DOI: https://doi.org/10.18698/0236-3933-2023-4-43-60

References

[1] Kuvykin Yu.A., Sokolov I.N., Olkhovskiy A.N. Study method for determining the frequency characteristics of condenser microphones with the use of frequency modulated signal using frequency modulated signal. Vestnik metrologa, 2021, no. 2, pp. 25--31 (in Russ.).

[2] Kuvykin Yu.A., Olkhovskiy A.N., Suprunyuk V.V., et al. A method for determining frequency response of microphones in unmuffled laboratory room using wideband signal excitement. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2021, no. 4 (137), pp. 169--187 (in Russ.). DOI: http://dx.doi.org/10.18698/0236-3933-2021-4-169-187

[3] Heyser R.C. Time delay spectrometry. New York, Acoustical Society of America, 1988.

[4] Robinson S.P., Hayman G., Harris P.M., et al. Signal-modelling methods applied to the free-field calibration of hydrophones and projectors in laboratory test tanks. Meas. Sc. Technol., 2018, vol. 29, no. 8, art. 085001. DOI: http://dx.doi.org/10.1088/1361-6501/aac752

[5] Kuvykin Yu.A., Sokolov I.N. [Automation of vibration transducers verification by means of verification systems VS-321 and VS-421. Metrological support of defence and security]. Mater. XII Vseros. NTK [Proc. XII Russ. Sc.-Tech. Conf.]. Povedniki, 2018, pp. 198--201 (in Russ.).

[6] Kuvykin Yu.A., Doroshenko E.Yu., Danilchenko N.N. [Comparative study of electrostatic exciters of various designs for the possibility of their use in working standards of sound pressure]. Mater. 44 NTK molodykh uchenykh -- voennykh metrologov [Proc. 44th Sc.-Tech. Conf. of Young Scientists --- Military Metrologists]. Kubinka, 2018, pp. 134---137 (in Russ.).

[7] Kuvykin Yu.A. [Features of determining the total error of automated vibration installations]. Metrologicheskoe obespechenie oborony i bezopasnosti v RF. Mater. 41 NTK molodykh uchenykh --- voennykh metrologov [Metrological Support of Defense and Security in the RF. Proc. 41st Sc.-Tech. Conf. of Young Scientists --- Military Metrologists]. Mytishchi, 2016, pp. 99--106 (in Russ.).

[8] Sokolov I.N., Kulak V.A. Modern approach to vibration testing: transition from abstractions to real data. Vestnik metrologa, 2014, no. 1, pp. 23--29 (in Russ.).

[9] Kuvykin Yu.A., Doroshenko E.Yu. [Pressure graduation of measuring condenser microphones in a small volume chamber]. Metrologicheskoe obespechenie oborony i bezopasnosti v RF. Mater. 39 NTK molodykh uchenykh --- voennykh metrologov [Metrological Support of Defense and Security in the RF. Proc. 39th Sc.-Tech. Conf. of Young Scientists --- Military Metrologists]. Mytishchi, 2015, pp. 248--258 (in Russ.).

[10] Walber Ch., Salzano C., Nowak M., et al. Acoustic methods of microphone calibration. ICV22, 2015, pp. 103--109.

[11] Lavrov R.O., Kuvykin Yu.A. Comparative analysis of techniques of attenuation the acoustic reflections effect at free-field calibration of airborne sound receivers. Telekommunikatsii i transport [Telecommunications and Transport], 2018, vol. 12, no. 7, pp. 59--62 (in Russ.).

[12] Barham R., Barrera-Figueroa S., Avison J.E.M. Secondary pressure calibration of measurement microphones. Metrologia, 2014, vol. 51, no. 3, pp. 129--138. DOI: https://doi.org/10.1088/0026-1394/51/3/129

[13] Naumov S.S., Knyazeva N.I., Burenkov S.V. Mnogofunktsionalnye akusticheskie izmereniya na osnove modifitsirovannogo metoda spektrometrii vremennykh zaderzhek. Akusticheskie izmereniya. Metody i sredstva. IV Sessiya Rossiyskogo akusticheskogo obshchestva [Multifunctional acoustic measurements based on a modified method of time delay spectrometry. Acoustic measurements. Methods and means. IV Session of the Russian Acoustic Society]. Moscow, Akust. in-t im. N.N. Andreeva Publ., 1995, pp. 9--14 (in Russ.).

[14] Heyser R.S. Acoustical measurements by time delay spectrometry. JAES, 1967, vol. 15, no. 4, pp. 370--382.

[15] Sysel P., Rajmic P. Goertzel algorithm generalized to non-integer multiples of fundamental frequency. EURASIP J. Adv. Signal Process., 2012, art. 56. DOI: https://doi.org/10.1186/1687-6180-2012-56

[16] Danilov A.A., Sputnova D.V. [Analysis of models for describing the instability of measuring instruments]. Sb. dokl. Mezhdunar. nauch.-prakt. 175 let VNIIM im. D.I. Mendeleeva i Natsionalnoy sisteme obespecheniya edinstva izmereniy [Proc. Int. Sc.-Pract. Conf. 175 Years of VNIIM im. D.I. Mendeleev and the National System for Ensuring the Uniformity of Measurements]. St. Petersburg, 2017, pp. 49 (in Russ.).

[17] Khrapov F.I. Analysis of sources of redundant information about state of the measuring channels of measuring systems for adjusting the calibration intervals of measuring systems. Vestnik metrologa, 2011, no. 1, pp. 12--14 (in Russ.).

[18] Gapeeva V.D., Tsybenko V.A. Screening out big measurement errors of results using various criteria in Excel environment. Molodoy uchenyy [Young Scientis], 2021, no. 49, pp. 20--27 (in Russ.).