Prospective evaluation of hearing aid fitting adjusted toward one-third functional gain in patients with sensorineural hearing loss.
Unknown authors
Aug 2026· Auris, nasus, larynx· Vol 53 5, pp.
689-695
· 0 citations· 11 references
Medicine
Abstract
Objective
To prospectively evaluate whether modifying DSL version 5-based hearing aid (HA) fittings by adjusting gain on HA fitting software so that measured functional gain (FG) approached a one-third gain (1/3G) target could provide appropriate fitting outcomes in patients with sensorineural hearing loss.
Methods
Twenty-four patients (48 ears) with bilateral sensorineural hearing loss underwent initial HA fitting using the DSL version 5 prescription formula. FG was measured at 250-4000 Hz, and HA gain was adjusted on HA fitting software so that FG approached the target 1/3 G. Speech discrimination scores at 65 and 80 dB SPL were evaluated after a two-week trial period using the 67-S Japanese monosyllable word list. Based on speech discrimination test results, ears were classified as well-fitting or non-well-fitting. FG values were compared between the two groups.
Results
Twenty-one patients (42 ears) completed the study. Thirty-one ears (73%) were classified as well-fitting. Although HA gain was adjusted toward the target 1/3 G, measured FG values at 250 and 500 Hz remained lower than the target values. In well-fitting ears, low-frequency FG values were lower than the target 1/3 G, whereas FG at 2000 Hz was close to the target value. In contrast, non-well-fitting ears showed low-frequency FG values closer to the target 1/3 G, whereas FG values at 2000 and 4000 Hz remained below the target values.
Conclusions
Although HAs adjusted toward a 1/3 G target did not achieve the intended FG values, particularly at low frequencies, relatively favorable fitting outcomes were obtained in approximately three-quarters of the ears. In well-fitting ears, low-frequency FG remained below the target 1/3 G, whereas FG in the mid-frequency range around 2000 Hz was close to the target value. These findings provide a basis for future prospective studies to clarify how these FG characteristics should be applied to optimize HA adjustment.
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James C. Davis, Kelechi G. Kalu, Huiyun Peng et al.· 1 citation
LLMs are increasingly used for code generation, yet they frequently hallucinate non-existent software packages, creating exploitable entry points into the software supply chain. We make four contributions to this problem. First, we show that prior evaluation methodologies systematically inflate hallucination rates by misclassifying standard-library modules as hallucinations in some languages. For Python, the overestimation reaches 9.4 percentage points. Second, we evaluate seven inference-time defenses for mitigating package hallucinations, including five guided decoding strategies (Greedy, Contrastive, DoLa, Nudging, and Active Layer-Contrastive Decoding), an iterative self-refinement approach (Self-Refine), and a Retrieval-Augmented Generation (RAG)-based defense.. Across eight models spanning five families and four programming languages (Python, JavaScript, Ruby, Rust), RAG reduces the package hallucination rate (PHR) in 18 of 32 model--language configurations. Third, we introduce Package Utility (PU) to assess whether defenses preserve valid and task-relevant recommendations. Among strategies evaluated, Greedy decoding provides the strongest average mitigation--utility trade-off. Fourth, we stress-test all strategies under adversarial prompts seeded with fabricated package names and find that PHR surges by up to 45 percentage points relative to standard prompts, with Ruby consistently the most vulnerable language (80.9--95.2\%). Under adversarial conditions, RAG and Self-Refine outperform all decoding-only strategies, indicating that robust defense requires either external grounding or iterative self-verification when prompts are actively hostile. Our results recast package hallucination as both a measurement problem and a decoding-time control problem, and they demonstrate that the choice of defense must be matched to the threat model and recommendation utility.
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D. R. Patil, Varad Salgare, Devaj Arya et al.· International Journal for Re...· 0 citations
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PURPOSE
This study aimed to develop and validate OcuTOP, a novel handheld corneal topography device designed to overcome the limitations of conventional desktop systems. By incorporating software-based misalignment correction, OcuTOP seeks to provide accurate corneal curvature measurements without need for bulky mechanical alignment mechanisms. Validation was performed using a reference surface with known geometry to assess device accuracy and robustness.
METHODS
The OcuTOP device (75 g; 85 × 60 × 60 mm) was evaluated using a reference button with a known curvature (43.3 D). Controlled misalignments were introduced in longitudinal (Z: 42.5-43.5 mm), lateral (X: ±2 mm), and vertical (Y: ±2 mm) directions, generating 243 test cases. Images acquired by the device were analysed using neural network algorithms to estimate misalignment parameters, which were subsequently used to correct axial and tangential curvature maps and estimate button diameter, analogous to white-to-white corneal diameter.
RESULTS
OcuTOP demonstrated strong agreement with reference curvature values across all misalignment conditions (P for K1 & K2 = 0.365, 0.385 at Z = 42.5 mm; 0.606, 0.907 at Z = 43.0 mm; 0.297, 0.462 at Z = 43.5 mm). Even at maximum displacement (±2 mm in X and Y), central curvature predictions remained within 2% of true values, with mean astigmatism artifacts limited to <0.2 D at the apex of the surface. However, the errors in estimating curvature values increased progressively towards the periphery. Neural network estimation of Z distance achieved a mean error of 0.06 ± 0.05 mm, with no significant influence on the ability of the device to estimate curvature. WTW predictions were also consistent, with a mean value of 11.66 mm, differing by <1.5% from the reference diameter.
CONCLUSIONS
OcuTOP's software-based correction reliably compensates for translational and longitudinal misalignments, showing promising results for future studies enabling accurate corneal surface measurements without mechanical stabilisation.
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