Abstract:Binaural hearing is the ability of the human auditory system to integrate information received from both ears simultaneously. Binaural hearing is fundamental in understanding speech in noisy backgrounds. Any disfunction in one or both ears could cause a disruption in the processing mechanism. Auditory evoked potentials (AEPs) are electrical potentials evoked by externally presented auditory stimuli from any part of the auditory system. A non-invasive technology, electroencephalography (EEG) is used for the mon… Show more
“…A questionnaire was completed by each subject to ensure a healthy otological history. The experimental set up and hardware was the same as explained in [ 20 ].…”
Section: Methodsmentioning
confidence: 99%
“…The EEG method eliminates reliance on participant literacy and communication skills and is relatively easy to perform [ 18 ], making it highly suitable for young children [ 19 ]. Although collecting an EEG can be more challenging than a traditional hearing assessment, using the correct stimulus parameters, recording standards, and processing techniques can make this method suitable and feasible for binaural hearing assessment [ 20 , 21 ].…”
Hearing loss is a prevalent health issue that affects individuals worldwide. Binaural hearing refers to the ability to integrate information received simultaneously from both ears, allowing individuals to identify, locate, and separate sound sources. Auditory evoked potentials (AEPs) refer to the electrical responses that are generated within any part of the auditory system in response to auditory stimuli presented externally. Electroencephalography (EEG) is a non-invasive technology used for the monitoring of AEPs. This research aims to investigate the use of audiometric EEGs as an objective method to detect specific features of binaural hearing with frequency and time domain analysis techniques. Thirty-five subjects with normal hearing and a mean age of 27.35 participated in the research. The stimuli used in the current study were designed to investigate the impact of binaural phase shifts of the auditory stimuli in the presence of noise. The frequency domain and time domain analyses provided statistically significant and promising novel findings. The study utilized Blackman windowed 18 ms and 48 ms pure tones as stimuli, embedded in noise maskers, of frequencies 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1000 Hz in homophasic (the same phase in both ears) and antiphasic (180-degree phase difference between the two ears) conditions. The study focuses on the effect of phase reversal of auditory stimuli in noise of the middle latency response (MLR) and late latency response (LLR) regions of the AEPs. The frequency domain analysis revealed a significant difference in the frequency bands of 20 to 25 Hz and 25 to 30 Hz when elicited by antiphasic and homophasic stimuli of 500 Hz for MLRs and 500 Hz and 250 Hz for LLRs. The time domain analysis identified the Na peak of the MLR for 500 Hz, the N1 peak of the LLR for 500 Hz stimuli and the P300 peak of the LLR for 250 Hz as significant potential markers in detecting binaural processing in the brain.
“…A questionnaire was completed by each subject to ensure a healthy otological history. The experimental set up and hardware was the same as explained in [ 20 ].…”
Section: Methodsmentioning
confidence: 99%
“…The EEG method eliminates reliance on participant literacy and communication skills and is relatively easy to perform [ 18 ], making it highly suitable for young children [ 19 ]. Although collecting an EEG can be more challenging than a traditional hearing assessment, using the correct stimulus parameters, recording standards, and processing techniques can make this method suitable and feasible for binaural hearing assessment [ 20 , 21 ].…”
Hearing loss is a prevalent health issue that affects individuals worldwide. Binaural hearing refers to the ability to integrate information received simultaneously from both ears, allowing individuals to identify, locate, and separate sound sources. Auditory evoked potentials (AEPs) refer to the electrical responses that are generated within any part of the auditory system in response to auditory stimuli presented externally. Electroencephalography (EEG) is a non-invasive technology used for the monitoring of AEPs. This research aims to investigate the use of audiometric EEGs as an objective method to detect specific features of binaural hearing with frequency and time domain analysis techniques. Thirty-five subjects with normal hearing and a mean age of 27.35 participated in the research. The stimuli used in the current study were designed to investigate the impact of binaural phase shifts of the auditory stimuli in the presence of noise. The frequency domain and time domain analyses provided statistically significant and promising novel findings. The study utilized Blackman windowed 18 ms and 48 ms pure tones as stimuli, embedded in noise maskers, of frequencies 125 Hz, 250 Hz, 500 Hz, 750 Hz, 1000 Hz in homophasic (the same phase in both ears) and antiphasic (180-degree phase difference between the two ears) conditions. The study focuses on the effect of phase reversal of auditory stimuli in noise of the middle latency response (MLR) and late latency response (LLR) regions of the AEPs. The frequency domain analysis revealed a significant difference in the frequency bands of 20 to 25 Hz and 25 to 30 Hz when elicited by antiphasic and homophasic stimuli of 500 Hz for MLRs and 500 Hz and 250 Hz for LLRs. The time domain analysis identified the Na peak of the MLR for 500 Hz, the N1 peak of the LLR for 500 Hz stimuli and the P300 peak of the LLR for 250 Hz as significant potential markers in detecting binaural processing in the brain.
“…The study was approved by the Humans Ethics Committee of Charles Darwin University, Australia as explained in H18014 _ Detecting Binaural Processing in the Audiometric EEG ( Ignatious et al., 2021 ; Miles et al., 2021 ). The willingness of volunteers to take part in the BMLD testing was documented through written consent and each subject completed a questionnaire regarding their otological history.…”
Section: Methodsmentioning
confidence: 99%
“…The tones for BMLD testing were given with a duration of 3 ms, 18 ms and 48 ms. The time durations were chosen to corresponds to the duration of signals that can be used for the generation of AEPs ( Ignatious et al., 2021 ; Miles et al., 2021 ): 3 ms for the Auditory Brainstem Response (ABR), 18 ms for the Middle Latency Response (MLR) and 48 ms for the Late Latency Response (LLR). The initial dB level for the masker is set as 20 dB while it is set at 40 dB for the tone.…”
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