scholarly journals Amplitude modulation detection and temporal modulation cutoff frequency in normal hearing infants

2019 ◽  
Vol 145 (6) ◽  
pp. 3667-3674 ◽  
Author(s):  
Brian A. Walker ◽  
Caitlin M. Gerhards ◽  
Lynne A. Werner ◽  
David L. Horn
Keyword(s):  
Amplitude Modulation ◽  
Cutoff Frequency ◽  
Normal Hearing ◽  
Temporal Modulation ◽  
Modulation Detection

scholarly journals Association of Auditory Steady State Responses with Perception of Temporal Modulations and Speech in Noise

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Venugopal Manju ◽  
Kizhakke Kodiyath Gopika ◽  
Pitchai Muthu Arivudai Nambi
Keyword(s):  
Steady State ◽  
Speech Perception ◽  
Amplitude Modulation ◽  
Modulation Depth ◽  
Normal Hearing ◽  
Positive Correlation ◽  
Behavioral Method ◽  
Modulation Detection ◽  
Auditory Steady State Responses ◽  
40 Hz

Amplitude modulations in the speech convey important acoustic information for speech perception. Auditory steady state response (ASSR) is thought to be physiological correlate of amplitude modulation perception. Limited research is available exploring association between ASSR and modulation detection ability as well as speech perception. Correlation of modulation detection thresholds (MDT) and speech perception in noise with ASSR was investigated in twofold experiments. 30 normal hearing individuals and 11 normal hearing individuals within age range of 18–24 years participated in experiments 1 and 2, respectively. MDTs were measured using ASSR and behavioral method at 60 Hz, 80 Hz, and 120 Hz modulation frequencies in the first experiment. ASSR threshold was obtained by estimating the minimum modulation depth required to elicit ASSR (ASSR-MDT). There was a positive correlation between behavioral MDT and ASSR-MDT at all modulation frequencies. In the second experiment, ASSR for amplitude modulation (AM) sweeps at four different frequency ranges (30–40 Hz, 40–50 Hz, 50–60 Hz, and 60–70 Hz) was recorded. Speech recognition threshold in noise (SRTn) was estimated using staircase procedure. There was a positive correlation between amplitude of ASSR for AM sweep with frequency range of 30–40 Hz and SRTn. Results of the current study suggest that ASSR provides substantial information about temporal modulation and speech perception.

scholarly journals Verification of a Mobile Psychoacoustic Test System

2021 ◽  
Vol 11 (4) ◽  
pp. 673-690
Author(s):  
Jordana C. Soares ◽  
Sangamanatha A. Veeranna ◽  
Vijay Parsa ◽  
Chris Allan ◽  
Winnie Ly ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Frequency Discrimination ◽  
Normal Hearing ◽  
Test System ◽  
Gap Detection ◽  
Mobile System ◽  
Strict Adherence ◽  
Feasible Option ◽  
Modulation Detection ◽  
Hearing Difficulties

Many hearing difficulties can be explained as a loss of audibility, a problem easily detected and treated using standard audiological procedures. Yet, hearing can be much poorer (or more impaired) than audibility predicts because of deficits in the suprathreshold mechanisms that encode the rapidly changing, spectral, temporal, and binaural aspects of the sound. The ability to evaluate these mechanisms requires well-defined stimuli and strict adherence to rigorous psychometric principles. This project reports on the comparison between a laboratory-based and a mobile system’s results for psychoacoustic assessment in adult listeners with normal hearing. A description of both systems employed is provided. Psychoacoustic tests include frequency discrimination, amplitude modulation detection, binaural encoding, and temporal gap detection. Results reported by the mobile system were not significantly different from those collected with the laboratory-based system for most of the tests and were consistent with those reported in the literature. The mobile system has the potential to be a feasible option for the assessment of suprathreshold auditory encoding abilities.

Frequency Modulation Detection by Normally Hearing and Profoundly Hearing-Impaired Listeners

1987 ◽  
Vol 30 (4) ◽  
pp. 558-563 ◽  
Author(s):  
Ken W. Grant
Keyword(s):  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Frequency Difference ◽  
Constant Amplitude ◽  
Modulation Detection ◽  
Frequency Modulation Detection ◽  
Frequency Modulations

The ability of normally hearing and profoundly hearing-impaired subjects to detect frequency modulations was evaluated under conditions where the amplitudes of the test signals were either constant (CA), sinusoidally modulated (SAM), or randomly modulated (RAM). Results for hearing-impaired listeners showed larger frequency difference limens (DLFM) than those for normally hearing listeners for all test frequencies (100 to 1000 Hz) and for all amplitude conditions. For both normal-hearing and hearing-impaired subjects, the DFLM was smallest for the constant amplitude condition and largest for the randomly modulated condition. Differences in performance between the RAM and CA conditions were generally much larger for impaired listeners than for normally hearing listeners. With random amplitude modulation, DLFMs for the hearing-impaired subjects were approximately 36 times larger than those for normally hearing subjects.

Amplitude-modulation detection by gerbils in reverberant sound fields

2013 ◽  
Vol 302 ◽  
pp. 107-112 ◽  
Author(s):  
Andrea Lingner ◽  
Kathrin Kugler ◽  
Benedikt Grothe ◽  
Lutz Wiegrebe
Keyword(s):  
Amplitude Modulation ◽  
Sound Fields ◽  
Modulation Detection

scholarly journals Effect of sinusoidally amplitude modulated broadband noise stimuli on stream segregation in individuals with sensorineural hearing loss

2020 ◽  
Author(s):  
Jawahar Antony P ◽  
Animesh Barman
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Amplitude Modulation ◽  
Modulation Frequency ◽  
Study Groups ◽  
Normal Hearing ◽  
Broadband Noise ◽  
Sensorineural Hearing ◽  
Stream Segregation ◽  
Temporal Cues

Background and Aim: Auditory stream segre­gation is a phenomenon that splits sounds into different streams. The temporal cues that contri­bute for stream segregation have been previ­ously studied in normal hearing people. In peo­ple with sensorineural hearing loss (SNHL), the cues for temporal envelope coding is not usually affected, while the temporal fine structure cues are affected. These two temporal cues depend on the amplitude modulation frequency. The present study aimed to evaluate the effect of sin­usoidal amplitude modulated (SAM) broadband noises on stream segregation in individuals with SNHL. Methods: Thirty normal hearing subjects and 30 subjects with mild to moderate bilateral SNHL participated in the study. Two experi­ments were performed; in the first experiment, the AB sequence of broadband SAM stimuli was presented, while in the second experiment, only B sequence was presented. A low (16 Hz) and a high (256 kHz) standard modulation fre­quency were used in these experiments. The subjects were asked to find the irregularities in the rhythmic sequence. Results: Both the study groups could identify the irregularities similarly in both the experi­ments. The minimum cumulative delay was sli­ghtly higher in the SNHL group. Conclusion: It is suggested that the temporal cues provided by the broadband SAM noises for low and high standard modulation frequencies were not used for stream segregation by either normal hearing subjects or those with SNHL. Keywords: Stream segregation; sinusoidal amplitude modulation; sensorineural hearing loss

scholarly journals Amplitude modulation detection by human listeners in reverberant sound fields: carrier bandwidth effects and binaural versus monaural comparison

2012 ◽  
Vol 131 (4) ◽  
pp. 3517-3517
Author(s):  
Pavel Zahorik ◽  
Duck O. Kim ◽  
Shigeyuki Kuwada ◽  
Paul W. Anderson ◽  
Eugene Brandewie ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Sound Fields ◽  
Modulation Detection

scholarly journals How Do Age and Hearing Loss Impact Spectral Envelope Perception?

2018 ◽  
Vol 61 (9) ◽  
pp. 2376-2385 ◽  
Author(s):  
Erol J. Ozmeral ◽  
Ann C. Eddins ◽  
David A. Eddins
Keyword(s):  
Hearing Loss ◽  
Spectral Resolution ◽  
Modulation Frequency ◽  
Normal Hearing ◽  
Frequency Resolution ◽  
Spectral Envelope ◽  
Detection Thresholds ◽  
Spectral Modulation ◽  
Modulation Detection ◽  
Moderate Hearing Loss

Purpose The goal was to evaluate the potential effects of increasing hearing loss and advancing age on spectral envelope perception. Method Spectral modulation detection was measured as a function of spectral modulation frequency from 0.5 to 8.0 cycles/octave. The spectral modulation task involved discrimination of a noise carrier (3 octaves wide from 400 to 3200 Hz) with a flat spectral envelope from a noise having a sinusoidal spectral envelope across a logarithmic audio frequency scale. Spectral modulation transfer functions (SMTFs; modulation threshold vs. modulation frequency) were computed and compared 4 listener groups: young normal hearing, older normal hearing, older with mild hearing loss, and older with moderate hearing loss. Estimates of the internal spectral contrast were obtained by computing excitation patterns. Results SMTFs for young listeners with normal hearing were bandpass with a minimum modulation detection threshold at 2 cycles/octave, and older listeners with normal hearing were remarkably similar to those of the young listeners. SMTFs for older listeners with mild and moderate hearing loss had a low-pass rather than a bandpass shape. Excitation patterns revealed that limited spectral resolution dictated modulation detection thresholds at high but not low spectral modulation frequencies. Even when factoring out (presumed) differences in frequency resolution among groups, the spectral envelope perception was worse for the group with moderate hearing loss than the other 3 groups. Conclusions The spectral envelope perception as measured by spectral modulation detection thresholds is compromised by hearing loss at higher spectral modulation frequencies, consistent with predictions of reduced spectral resolution known to accompany sensorineural hearing loss. Spectral envelope perception is not negatively impacted by advancing age at any spectral modulation frequency between 0.5 and 8.0 cycles/octave.

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