Assessing Listening Effort at Different Signal-to-noise Ratios in Bone-anchored Users

Inclusion Criteria

• •Minimum 18 years and maximum 70 years old.
• •UK English mother tongue.
• •Bilateral conductive or mixed hearing loss.
• •Users fitted unilaterally or bilaterally on abutment.
• •Users are currently fitted with either Ponto 3, Ponto Plus or Ponto Pro (devices with a fitting range up to 45 dB HL).
• •Users with at least 6 months of daily experience with one Ponto sound processor.
• •BC thresholds of the implanted ear(s) better (lower) than or equal to 40 dB HL (average of 0.5, 1, 2 and 3 kHz) based on BC in-situ measurement at the first visit.
• •People currently employed/self-employed (since the Need for Recovery questionnaire refers to work-related fatigue).
• •Speech recognition scores better (higher) than or equal to 50% at +4 dB SNR with OSN OFF (as assessed via the first training list at Visit 1). This is to avoid including patients that are already "giving up" at +4 dB SNR.
• •Users entitled for a sound-processor upgrade (according to the investigator) will first be selected. If there are not enough users entitled for an upgrade, then patients fitted with Ponto between 7 and 12 months before visit 1 will be considered. If there are not enough users within 7-12 months, then patients fitted with Ponto between 13 and 18 months before visit 1 will be considered.