Related Experiment Video
Updated: Aug 22, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
The effect of presentation level and compression characteristics on sentence recognition in modulated noise
Henrik L Olsen1, Ake Olofsson, Björn Hagerman
1Unit of Technical and Clinical Audiology, Department of Clinical Neuroscience, Karolinska Institutet, Danderyd, Sweden. Henrik.Olsen@cns.ki.se
Abstract:
The effect of fast-acting compression on speech recognition in fully modulated (FUM) noise in listeners with normal and impaired hearing was investigated in two experiments We wanted to determine the relationships between the benefit from compression and some audiological factors. Furthermore, the sensitivity to changes in compression parameters was also evaluated. The results showed that two-thirds of the listeners performed worse with fast-acting compression than with linear processing. Normal-hearing listeners showed the most benefit from compression. A significant relationship was found between benefit from compression and speech-to-noise ratio at threshold (SNRT) in slightly modulated (SM) noise. Pure-tone threshold was found to be a weak predictor of benefit from compression. No relationship was found between benefit from compression and the release of masking for the FUM noise. The variability in the results across different compression parameters was related to SNRT in SM noise. The results suggest an inverse relationship between benefit from compression and the severity of the suprathreshold hearing loss
Related Concept Videos
Perceiving Loudness, Pitch, and Location
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Chunking and Rehearsal in Sensory Memory
Classification of Signals
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
Sound Intensity Level
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...
Difference from Background: Limit of Detection
The LOD indicates the presence or absence...
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
