Auditory processing in autism

Rentschler describes common auditory processing differences in autism, including difficulties understanding spoken language, filtering out background noise from speech, and sound tolerance issues (5:10). The speaker outlines services typically provided for auditory processing, highlighting occupational therapy as one that best addresses sensory processing (7:35). She provides references for literature reviews on best auditory practices and underscores how difficult it is to create evidence-based interventions (9:00). The speaker asserts the importance of incorporating lived experiences into research and care tactics  (10:10). 

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The presenter discusses how auditory processing differences can impact an individual’s sensory gating or ability to filter, prioritize, and integrate sensory inputs. This plays into excitation/inhibition imbalances in autism and can also impact pain sensitivity and reactivity (11:50). Rentschler defines central gain as the brain’s ability to adapt baseline auditory conditions according to received stimuli (13:00). She explains that when individuals over-protect their ears (wear ear muffs all the time, even when noise is low), they may readjust their central gain which creates even more sensitivity to loud or normal sounds (14:40).  

Auditory and visual misalignment

The presenter defines the temporal binding window (TBW) as the time it takes to organize sensory input into a cohesive percept (15:08). TBW is often longer in autism due to a mismatch between auditory and visual processing, which stems from atypical neural synchronization and brainstem differences (16:00). Rentschler emphasizes TBW plasticity and highlights its potential for successful auditory interventions (17:10). She reiterates that information from autistic people about their lived experiences is critical to guiding research and care (18:26). 

Impacts on communication

The speaker considers how enhanced pitch perception and difficulties with prosody, or the ability to detect intonations in speech (e.g., identify sarcasm), appear in autism (19:10). She explains how difficulties with speech/noise localization can sometimes make it seem like your child is purposefully ignoring you and underscores that this is likely not the case (20:17). Rentschler notes a study that showed a direct correlation between the rate of detected/missed environmental sounds and the presence/severity of restrictive/repetitive behaviors. Similarly, auditory deficits have been found to exacerbate social difficulties in many neurodiverse groups (21:36). Language impairments, she continues, are also significantly related to abnormal lateralization of the functional language network in neurodiverse populations (22:30).

Neurophysiologic underpinnings

The presenter displays a diagram showing how auditory inputs travel across the left and right hemispheres of the brain depending on which ear receives the stimuli (23:39). While input received in the right ear travels directly to the left side of the brain, input received from the left must travel to the right hemisphere and then cross back to the left side through the Corpus Callosum. The Corpus Callosum is a bundle of nerve cells where the right and left hemispheres communicate (24:30). Rentschler explains all this to illustrate the significant differences in how the brain perceives sensory input across populations (25:30). 

Interventions and accessibility 

Hearing aids with remote microphones (often held by a teacher) help to filter out extra noise and are highly effective for increasing auditory processing (26:02). The speaker shares personal experiences with such microphones, underscoring their lack of accessibility due to poor insurance reimbursements (29:00). Rentschler reiterates brain plasticity and asserts that intervention focus must shift to training the auditory system instead of relying on tools which are not widely available (30:04). She discusses therapeutic techniques like binaural interaction, or how the ears work together to process speech, and highlights dichotic listenings as an efficient exercise for minimizing sound sensitivity. Phonemic entrainment, auditory-motor synchronization, and temporal processing remediation also show promise as short-term intensive interventions that produce long-lasting auditory shifts (31:20). 

Audiologists 

The presenter outlines general roles for audiologists, including ruling out hearing loss and targeting sound tolerance (33:20). Audiologists target processing issues by addressing bottom-up skills via binaural balance training, phonemic training, and rhythm and motor output training (36:05). Rentschler notes mixed results from working memory training and asserts the need to accept aspects of disability as natural instead of something that must be cured or fixed (37:28). She notes the severe lack of audiological practitioners, and offers viewers to contact her directly for assistance in finding their closest carer. She also emphasizes the need for educational support (33:20). 

Critical takeaways

The speaker discusses a neurodiversity-affirming approach to social communication support, noting disability rights and universal design as concepts that improve access to care and quality of life for everyone (38:45). She notes the double empathy problem and encourages social skills training for neurotypical populations. Rentschler urges clinical professionals not to force eye contact with autistic patients as this provokes the stress response, which further impairs listening (39:45). Mental health, she continues, is paramount because no real learning can occur in the fight or flight response. She suggests avoiding power plays and being mindful of negative messaging that individuals may internalize as ableism (41:20). 

What’s next?

Moving forward, Rentschler emphasizes the need for more rigorous research on the clinical feasibility of interventions. This research must include neurodivergent voices and community partnerships with local clinics. She states that clinical consensus must be reimagined in alignment with the disability rights paradigm. Systemic supports such as health insurance, education, and accommodations should also be reimagined with neurodiverse and disabled voices at the center (42:15). 

Rentschler summarizes the presentation, highlighting the need for therapeutic auditory support and greater access to care. She reiterates the impact that sensory differences can have on skills necessary for social communication, mental health, and overall sense of agency. She asserts that we can (and must) provide effective sensory supports based on individual neurotypes (44:35). The presenter provides references (45:10) and thanks before the Q&A session (46:45).