Effects of infrasound on the perception of a low-frequency sound

被引:0
|
作者
Friedrich, Bjoern [1 ]
Joost, Holger [2 ]
Fedtke, Thomas [2 ]
Verhey, Jesko L. [1 ]
机构
[1] Otto von Guericke Univ, Dept Expt Audiol, Leipziger Str 44, D-39120 Magdeburg, Germany
[2] Phys Tech Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany
来源
ACTA ACUSTICA | 2023年 / 7卷
关键词
Infrasound; Low-frequency sound; Amplitude modulation; Absolute threshold; Phase effects; PRODUCT OTOACOUSTIC EMISSIONS; AMPLITUDE-MODULATION; DETECTION THRESHOLDS; SINUSOIDAL CARRIERS; DISCRIMINATION; INTERFERENCE; MASKING; HEARING; LEVEL;
D O I
10.1051/aacus/2023061
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The study investigated the effects of an 8 Hz infrasound sinusoid, presented at a sensation level (SL) of 9 decibels (dB), on the detection of i) a 64 Hz pure tone and ii) an 8 Hz sinusoidal amplitude modulation imposed on a 64 Hz sinusoidal carrier, presented at an SL of 25 dB. Two phase relations between infrasound and amplitude modulation were used: 0 degrees (in phase) and 180 degrees (in antiphase). Detection thresholds of the 64 Hz pure tone were, on average across 19 normal-hearing listeners, 4.6 dB higher in the presence than in the absence of the infrasound. Modulation detection thresholds also increased in the presence of the infrasound, on average by about 3 dB. Large individual differences in modulation detection thresholds were observed with respect to the two phase relations. On average across all listeners, however, the difference in modulation detection thresholds between in-phase and antiphase infrasound was not significant. The study shows that supra-threshold infrasound masks frequency components in the low audio-frequency range and affects the perception of amplitude modulations imposed on them.
引用
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页数:9
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