Recent Publications

• Jaden Pieper and Stephen D. Voran, “Analysis of Multiple Noisy Measurements and their Resamplings via Expected Values of Correlation and Mean-Squared-Error,” Technical Memorandum NTIA TM-26-581, March 2026

  This memorandum provides mathematical relationships for agreement between true measurand values, means of multiple imperfect measurements, and resampled measurement means. Agreement is quantified here in terms of Pearson correlation coefficient (PCC...

• Jaden Pieper and Stephen D. Voran, “Unseen but not Unknown: Using Dataset Concealment to Robustly Evaluate Speech Quality Estimation Models,” Conference Paper, February 2026

  We introduce Dataset Concealment (DSC), a rigorous new procedure for evaluating and interpreting objective speech quality estimation models. DSC quantifies and decomposes the performance gap between research results and real-world application requir...

• Stephen D. Voran and Jaden Pieper, “Frequency-Domain Signal-to-Noise Ratios Illuminate the Effects of the Spectral Consistency Constraint and Griffin-Lim Algorithms,” Conference Paper, October 2025

  The restoration of degraded audio signals is often performed on complex-valued frequency-domain (FD) representations. This requires manipulation of either magnitudes and phases or real and imaginary parts. In general, these manipulations do not prod...

• Nicholas DeMinco, Paul M. McKenna, and Robert Johnk, “A Comparative Analysis of Multiple Knife-Edge Diffraction Methods,” Technical Report NTIA TR 26-580, October 2025

  The results of a thorough comparative analysis of alternative graphical prediction methods for multiple knife-edge diffraction are presented and compared to the method developed by Vogler. The Vogler multiple knife-edge diffraction loss is rigorous ...