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IRCT20220206053952N1 IRCT 2022-04-11 Iran University of Medical Sciences Evaluation of audio-visual integration in unilateral hearing loss Evaluation of audio-visual integration and recalibration of auditory space in unilateral hearing loss pre and post auditory localization training using ventriloquism effect 2022-05-11 anticipated 50 Complete https://irct.ir/trial/62427 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Other, Purpose: Supportive. N/A Poor Auditory Localization( Central ). Intervention 1: Intervention group 1 (People with unilateral chronic hearing loss) Each session is called a "learning unit". Each learning unit consists of 4 sections. In the first part, for ease of localization, the wide-band stimulus has a delay of 1000 milliseconds. On the other hand, four azimuths of 0, 90, 180 and 270 degrees are selected at this stage and the person under training is also told that the sound will be presented in one of these directions. This reduces the difficulty of locating and increases the patient's confidence to continue working. 5 stimuli will be provided from each speaker and the response will be recorded using the GUI. At this stage, the response of the patient is considered to be reinforced in such a way that, if it is correct, a green light on the response recorder will be turned on and feedback will be given. If the answer is wrong, a red light will come on first and then the correct answer will appear on the screen so that the patient can accurately identify the new symptoms. In the following, other azimuth will be presented diagonally. First Azimuth 30, 120, 210 and 300 degrees and next Azimuth 60, 150, 240 and 330 degrees in the mentioned style, the stimuli are presented and the answer related to each angle is recorded in the GUI, thus all 12 speakers Provide the stimulus and the person's response is recorded in 360 degrees.In the second part, all the previous steps are repeated using a stimulus with a delay of 300 milliseconds. In this new exercise, the positioning task becomes more difficult due to the reduction of the stimulus delay.At this stage, several corrective mechanisms have been considered to improve patients' performance. These mechanisms include the following: 1- Following the correct answer, the green light turns on for confirmation.2- After the wrong answer, the correct location of the speaker is displayed to increase the patient's accuracy 3- The angles that are answered incorrectly are identified and repeated in the next session 4- In angles where the wrong answer is not corrected, by limiting the patient's choices, it helps to increase his accuracy.In the third part, the task of localization becomes more difficult. In this way, the stimuli are presented randomly from the speakers and the listener has no background of the stimulus location and is no longer aware of the possible position of the sound source. In this section, the stimulus duration is 1000 milliseconds. Providing feedback and recording responses is the same as the previous step.In the fourth part, the details of the third part are applied, with the difference that the stimulus delay is 300 milliseconds. This will be the most difficult task for the patient.In total, there will be two weeks for each person and 3 days each week and one learning unit per day.After completing the four sections of the rehabilitation sessions, the patients' last response is recorded as "post-rehabilitation orientation response". Intervention 2: Intervention group 2: (People with normal hearing) All interventions to the intervention group 1 will be done here as well. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is It will be Specified by the supervisor
public Ahmad Geshani
Faculty of Rehabilitation Sciences, Madadkaran Str., Shahnazari Ave., Madar Sqr., Mirdamad Blvd.
Tehran Iran (Islamic Republic of) 15459-13487 +98 21 2225 0541 ageshani@tums.ac.ir Iran University of Medical Sciences scientific Farnoush Jarollahi
Faculty of Rehabilitation Sciences, Madadkaran Str., Shahnazari Ave., Madar Sqr., Mirdamad Blvd.
Tehran Iran (Islamic Republic of) 15459-13487 +98 21 2225 0541 jarollahi.f@iums.ac.ir Iran University of Medical Sciences Iran (Islamic Republic of) Inclusion criteria in the norm group: Normal hearing thresholds (based on goodman 1965) Normal middle ear function Absence of external ear l anomalies No history of ear surgery Not taking drugs that affect the CNS such as antiepileptic drugs and ... Norm vision Being right-handed No history of professional activity in music unilateral chronic hearing loss group: Presence of conductive hearing loss in the right ear, with more than 30 dB HL Hearing loss has lasted for at least 6 months Absence of external ear l anomalies Absence of cerumen and foreign body in the ear canal No history of ear surgery Not taking drugs that affect the CNS such as antiepileptic drugs and ... Normal vision Being right-handed No history of professional activity in music 18 years 40 years Both Reluctance to continue participating in the study at any stage H93.25 Poor Auditory Localization( Central ) Rehabilitation Rehabilitation Intervention group 1 (People with unilateral chronic hearing loss) Each session is called a "learning unit". Each learning unit consists of 4 sections. In the first part, for ease of localization, the wide-band stimulus has a delay of 1000 milliseconds. On the other hand, four azimuths of 0, 90, 180 and 270 degrees are selected at this stage and the person under training is also told that the sound will be presented in one of these directions. This reduces the difficulty of locating and increases the patient's confidence to continue working. 5 stimuli will be provided from each speaker and the response will be recorded using the GUI. At this stage, the response of the patient is considered to be reinforced in such a way that, if it is correct, a green light on the response recorder will be turned on and feedback will be given. If the answer is wrong, a red light will come on first and then the correct answer will appear on the screen so that the patient can accurately identify the new symptoms. In the following, other azimuth will be presented diagonally. First Azimuth 30, 120, 210 and 300 degrees and next Azimuth 60, 150, 240 and 330 degrees in the mentioned style, the stimuli are presented and the answer related to each angle is recorded in the GUI, thus all 12 speakers Provide the stimulus and the person's response is recorded in 360 degrees.In the second part, all the previous steps are repeated using a stimulus with a delay of 300 milliseconds. In this new exercise, the positioning task becomes more difficult due to the reduction of the stimulus delay.At this stage, several corrective mechanisms have been considered to improve patients' performance. These mechanisms include the following: 1- Following the correct answer, the green light turns on for confirmation.2- After the wrong answer, the correct location of the speaker is displayed to increase the patient's accuracy 3- The angles that are answered incorrectly are identified and repeated in the next session 4- In angles where the wrong answer is not corrected, by limiting the patient's choices, it helps to increase his accuracy.In the third part, the task of localization becomes more difficult. In this way, the stimuli are presented randomly from the speakers and the listener has no background of the stimulus location and is no longer aware of the possible position of the sound source. In this section, the stimulus duration is 1000 milliseconds. Providing feedback and recording responses is the same as the previous step.In the fourth part, the details of the third part are applied, with the difference that the stimulus delay is 300 milliseconds. This will be the most difficult task for the patient.In total, there will be two weeks for each person and 3 days each week and one learning unit per day.After completing the four sections of the rehabilitation sessions, the patients' last response is recorded as "post-rehabilitation orientation response". Intervention group 2: (People with normal hearing) All interventions to the intervention group 1 will be done here as well Localization Improvement Ventriloquist Effect Improvement Ventriloquist After Effect Improvement. Timepoint: Before and after Intervention. Method of measurement: By Testing. Auditory Localization with BBN Stimui in 12 Azimoth Auditory Localization with Low/ High / BBN Stimuli in 5 Azim. Timepoint: Before and after intervention. Method of measurement: By testing. Iran University of Medical Sciences Approved 2022-02-19 Research Ethics Committees of Iran University of Medical Sciences Audiology department, School of Rehabilitation Sciences, Iran University of Medical Sciences Maddadkaran St., Shahid Nazari St., Mother Square, Mirdamad Blvd, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran TEHRAN Tehran Iran (Islamic Republic of)