{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T06:06:13Z","timestamp":1778133973854,"version":"3.51.4"},"reference-count":33,"publisher":"Acoustical Society of America (ASA)","issue":"5","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2000,11,1]]},"abstract":"<jats:p>Masking period patterns (MPPs) for Schroeder-phase harmonic complexes containing equal-amplitude harmonics of a 100-Hz fundamental were determined for 5-ms tonal probes at 4000 and 1000 Hz. Maskers consisted of harmonics 2\u201350 (200\u20135000 Hz bandwidth) for 4000-Hz probes and harmonics 2\u201320 (200\u20132000 Hz) for 1000-Hz signals. Masked thresholds were determined for probe onsets 153, 155.5, 158, 160.5, and 163 ms following masker onset (masker duration=460 ms). Overall, results were similar for both probe frequencies. For listeners with normal hearing, MPPs for positive Schroeder-phase complexes masking 60 dB SPL probes were highly modulated and became flatter when probe level was increased to 80 dB SPL. MPPs were less modulated for listeners with sensorineural hearing loss than for normally hearing listeners at both 60 and 80 dB SPL probe levels. Thresholds in negative Schroeder-phase maskers were more similar across the two groups of listeners and across differences in probe position and probe level. The findings support an interpretation involving differences in the shape of the basilar-membrane waveform generated by each masker and possible influences of nonlinear cochlear processing on these internal responses. For normally hearing listeners, 60 dB SPL probes were most difficult to detect when temporally positioned so that probe frequency and masker instantaneous frequency were closely matched. For 80 dB SPL probes and for hearing-impaired listeners, probes presented at these same positions were often more easily detected than probes at other positions. The latter result appears to involve benefit associated with in-phase addition of the probe to a portion of the masker similar to the probe in both frequency and phase. This benefit was reduced or entirely eliminated when probe phase was altered so that this in-phase addition did not occur.<\/jats:p>","DOI":"10.1121\/1.1318897","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T14:09:06Z","timestamp":1027692546000},"page":"2307-2317","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["Effects of hearing impairment and presentation level on masking period patterns for Schroeder-phase harmonic complexes"],"prefix":"10.1121","volume":"108","author":[{"given":"Van","family":"Summers","sequence":"first","affiliation":[{"name":"Army Audiology & Speech Center, Walter Reed Army Medical Center, Washington, D.C.\u200920307-5001"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","reference":[{"key":"2023071403483822600_alc96","doi-asserted-by":"crossref","first-page":"2382","DOI":"10.1121\/1.417948","article-title":"Effects of phase and level on vowel identification: Data and predictions based on a nonlinear basilar-membrane model","volume":"100","year":"1996","journal-title":"J. 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