Understanding the Consequences of Recreational Noise Exposure

Inclusion Criteria: * Ability to give informed consent in English * In the age range stipulated for the group, i.e. 18-19 inclusive for group 1 and 30-50 inclusive for groups 2 - 4. * Audiometric thresholds in the range stipulated for the group, i.e. in the normal range for their age group for groups 1 - 3 and outside the normal range for their age group for group 4. * Noise exposure in the range stipulated for the group, as determined by the NESI, i.e. less than 15 units for groups 1 - 2 and 15 or more units for groups 3 - 4. Exclusion Criteria: * Contraindications for MRI * Motor impairment (for example, cerebral palsy) * Cognitive impairment (for example, dementia or brain injury) * Health conditions indicative of peripheral neuropathy (e.g. Type 1 diabetes).