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### Contents

E Ozimek A S?k Thresholds of perception of mixed modu | 3 |

R Wyrzykowski Propagation velocity of a vibration velocity | 17 |

A Puch Rectangular phase sound sources focusing radiated | 33 |

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### Common terms and phrases

absolute pitch acoustic field acoustic impedance acoustic potential acoustic pressure acoustic velocity acoustic wave aerosol aerosol particles amplitude and frequency amplitude distribution amplitude modulation factor analysis applied approximation axis baffle S0 BLACKMAN'S calculated Chebyshev distance coefficient constant density dependence determined diagram difference limens distance drift forces elements energy equation evaluation filter formula frequency changes frequency characteristics frequency modulation function HAMMING'S horn outlet impedance inlet insertion loss intensity investigated layer listeners maxima maxima and minima measuring points medium method mid-band frequency modulated signals modulating frequency modulation index obtained octave paper parameters perception perforation phase sound source plane sound Polish power spectral density presented in Fig problem propagation velocity psychoacoustic pulse radiation radius range reactive power Rzeszow signal structure solid body solution source a0 space spectral spectrum sphere standard standing wave stator temperature thresholds tomograms tone transducers transmission matrix ultrasonic vectors vibration velocity Warszawa wave-guide