Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Blind Procedures

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Prior exposure to a reverberant listening environment improves speech intelligibility in adult cochlear implant listeners.

Cochlear implants international·2016

Same author

Evaluation and analysis of whispered speech for cochlear implant users: Gender identification and intelligibility.

The Journal of the Acoustical Society of America·2015

Same author

Objective Quality and Intelligibility Prediction for Users of Assistive Listening Devices.

IEEE signal processing magazine·2015

Same author

Evaluation of adaptive dynamic range optimization in adverse listening conditions for cochlear implants.

The Journal of the Acoustical Society of America·2014

Same author

Evaluation of the importance of time-frequency contributions to speech intelligibility in noise.

The Journal of the Acoustical Society of America·2014

Same author

Environment-adaptive speech enhancement for bilateral cochlear implants using a single processor.

Speech communication·2014

Search research articles

Related Experiment Video

Updated: May 10, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Reverberation suppression in cochlear implants using a blind channel-selection strategy.

Oldooz Hazrati¹, Philipos C Loizou

¹Department of Electrical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, USA. hazrati@utdallas.edu

The Journal of the Acoustical Society of America

|June 8, 2013

Summary

A new blind method using residual-to-reverberant ratio (RRR) significantly improves speech intelligibility for cochlear implant (CI) users in reverberant environments. This approach enhances hearing in noisy conditions without needing prior room or signal information.

More Related Videos

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Related Experiment Videos

Last Updated: May 10, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation

Published on: August 4, 2023

Area of Science:

Audiology
Signal Processing
Acoustics

Background:

Reverberation significantly impairs speech intelligibility for cochlear implant (CI) users.
Existing methods like the ideal reverberant mask (IRM) show promise but require specific signal parameters.

Purpose of the Study:

To develop and evaluate a novel monaural blind channel-selection strategy for reverberation suppression.
To improve speech intelligibility for CI users in reverberant conditions without prior knowledge of the environment or clean speech signal.

Main Methods:

A blind channel-selection criterion based on the residual-to-reverberant ratio (RRR) was developed using linear prediction analysis.
Frequency channels with RRR below an adaptive threshold were retained, while others were zeroed out in each frame.
Performance was assessed through intelligibility listening tests with CI users in simulated reverberant environments (T60 = 0.6s and 0.8s).

Main Results:

The proposed blind strategy yielded significant speech intelligibility improvements for CI users.
Improvements exceeded 30 and 40 percentage points in T60 = 0.6s and 0.8s reverberant conditions, respectively.
The performance was comparable to the established ideal reverberant mask (IRM) strategy.

Conclusions:

The proposed blind channel-selection method effectively suppresses reverberation and enhances speech intelligibility for CI users.
This technique offers a practical solution for improving hearing in challenging acoustic environments without requiring complex prior information.