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Related Concept Videos

Masking and Demasking Agents01:19

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...

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Related Experiment Video

Updated: May 11, 2026

Testing Tactile Masking between the Forearms
08:05

Testing Tactile Masking between the Forearms

Published on: February 10, 2016

An energetic limit on spatial release from masking.

Virginia Best1, Eric R Thompson, Christine R Mason

  • 1Department of Speech, Language and Hearing Sciences and Hearing Research Center, Boston University, Boston, MA 02215, USA. Virginia.Best@nal.gov.au

Journal of the Association for Research in Otolaryngology : JARO
|May 8, 2013
PubMed
Summary
This summary is machine-generated.

Energetic masking, not spatial deficits, hinders hearing-impaired listeners in noisy environments. This study shows similar performance declines regardless of spatial separation when energetic masking is constant.

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Hearing Science

Background:

  • Spatial separation of sound sources can improve speech intelligibility in multi-talker environments.
  • Listeners with sensorineural hearing loss often exhibit reduced benefit from spatial cues.

Purpose of the Study:

  • To investigate whether energetic masking or spatial deficits limit speech intelligibility benefits in hearing-impaired listeners.
  • To determine the role of energetic masking in speech perception with spatialized maskers.

Main Methods:

  • Speech target and diotic presentation with two or four diotic or dichotic speech maskers.
  • Spatial separation introduced via interaural time differences (ITDs) or interaural level differences (ILDs).
  • Estimation of target-to-masker ratios for 50% correct speech recognition.

Main Results:

  • Hearing-impaired listeners performed worse than normal-hearing listeners across all spatial separation conditions.
  • Performance was similar for conditions with equivalent energetic masking, irrespective of the spatial configuration (e.g., ILD with four talkers vs. ITD with two talkers).

Conclusions:

  • Increased energetic masking, not a specific spatial processing deficit, likely limits speech intelligibility benefits in hearing-impaired individuals.
  • Findings suggest that reducing energetic masking is crucial for improving speech perception in complex auditory scenes for those with hearing loss.