Dr Hashir Aazh has been identified as the most cited Hyperacusis researcher in the UK and Europe and the second in the world in 2022 after Professor Pawel Jastreboff from the United States. Some of his notable research studies comprise: (1) Psychometric Evaluation of the Hyperacusis Impact Questionnaire (HIQ) and Sound Sensitivity Symptoms Questionnaire (SSSQ) Using a Clinical Population of Adult Patients with Tinnitus and Hyperacusis. (2) Parental separation and parental mental health in childhood and tinnitus and hyperacusis disability in adulthood: a retrospective exploratory analysis, and (3) Audio logical and Other Factors Predicting the Presence of Misophonia Symptoms Among a Clinical Population Seeking Help for Tinnitus and/or Hyperacusis