Threshold Sound Conditioning

Tested by the Stanford University School of Medicine, Threshold Sound Conditioning (TSC) is a non-invasive acoustic (sound) technology that is designed to maintain and restore your natural hearing ability and reduce the symptoms of tinnitus.

TSC works by identifying damaged frequencies and matching the volume of the audio signals with a one-bark frequency bandwidth to the descending threshold of an individual’s hearing in hopes of inducing continuous decreases of hearing thresholds. TSC is based on an algorithm that allows users to systematically lower their threshold in frequency bands between 900 and 13,000 Hz. 

Translation: TSC is a sound therapy that aims to help people improve their natural hearing ability and reduce the symptoms of tinnitus. Our software automatically generates personalized inaudible sound therapies based on in-app hearing assessments and subsequent sound therapies based on additional assessments to continue making progress as you use AudioCardio.

Threshold Sound Conditioning: Stanford Study Results

More than 75% of the study participants had a significant change of 10 decibels or more in the frequencies that were targeted.

The study results on the effect of TSC by the Stanford Medical School were released at the American Academy of Neurology in 2015, and the abstract of the research paper was published in the online edition of Neurology, an international journal of the American Academy of Neurology. 

The study results on the effect of TSC on the potential improvement of hearing was published in May 2020 in the international journal Laryngoscope Investigative Otolaryngology

The level of evidence, an indicator of reliability evaluation of TSC, was evaluated as 1a, the highest level of CEBM (Centre for Evidence-based Medicine) classification by the University of Oxford. The full text of the TSC research was made public on the link of the United States National Library of Medicine in June 2020.

Threshold Sound Conditioning: How it Works

TSC works by repeatedly stimulating the hair cells inside the ear at their descending threshold levels in hopes of promoting and supporting the neural pathways necessary for sound to travel to the brain.

Translation: Threshold Sound Conditioning works by stimulating the cells at just below the audible level to build up enough stimulation to activate them. As they activate and connect to nearby cells, these connections become stronger and more efficient in sending sounds to the brain so that you can recognize them as meaningful sounds.

However, the theory behind TSC starts with understanding how we hear and the concept of neuroplasticity or brain plasticity

You can learn more about how AudioCardio uses the science of sound, the concept of neuroplasticity, and Threshold Sound Conditioning to support individuals with hearing issues in our post here.