The Journal of auditory research最新文献

{"title":"Fabrication of a new headset for air- and bone-conduction audiometry.","authors":"R C Pearlman,&nbsp;H Whitworth","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The construction of a new audiometric headset which supports both ac and bc transducers is described. The bc transducer can be adjusted from 0-1500 g force. Future development should be directed toward (1) determining if such a headset is adjustable and stable on different size heads, (2) determining the test-retest reliability of the force measuring system, (3) reshaping the headset to make it smaller and more comfortable, and (4) consolidating the power/amplifier supply into a single unit.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"53-8"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14572316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-frequency Bekesy audiometry: VI. Pulsed vs. continuous signals.","authors":"M T Gauz,&nbsp;M M Smith","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Carefully screened normal-hearing young adults (5M, 25 F) performed a fixed-frequency version of high-frequency Bekesy audiometry (HFBA) with pure tones ranging from 2-16 kc/s, using the SHF E-800 unit (Gauz and Smith, J. Aud. Res., 1985, 25, 101-122). Pulsed (P) and Continuous (C) traces were recorded for 1 and 2 min, respectively. Data were described in types of response, amount of threshold decrement of the C trace re P traces, and rate of threshold decrement. P traces showed stability, while the majority (about 70-95%) of C traces overlapped P traces for 2-12 kc/s (our Type I). Some C traces (about 3-25% indicated adaptation followed by stabilization (Type II), while others (about 3-20% showed adaptation without stabilization (Type II/III), without regard for frequency. Rapid adaptation to the limits of the audiometer (Type III) was infrequently encountered below 14 kc/s, but showed an accelerated increase from 14-16 kc/s. During Min 2, a slight decrease in Type I responses and a corresponding increase in Type II responses were obtained. The rate of adaptation (in db/sec) increased with frequency and decreased with duration. This slope was relatively slight at 2-8 kc/s, increased at 10-12 kc/s, and increased notably at higher frequencies. Total amount of adaptation in db (P-C) increased with frequency, although mean values were rather small, most less than 5 db and none exceeding 10 db by the end of Min 2. Excluding Type III responses, no C-mode adaptation exceeded 24 db for any individual. The potential utility of HFBA and implications for future research were discussed.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"37-52"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14573436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conditions under which the Haas precedence effect may or may not occur.","authors":"D R Perrott,&nbsp;T Z Strybel,&nbsp;C L Manligas","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This investigation explored the stimulus conditions of the existence region in the free field of the Haas \"precedence\" effect. Experienced normal-hearing adults (N:5) listened to 50-msec bursts (0.2 msec rise-fall) of broadband noise from 2 loudspeakers at 1 m distance at ear level, at +/- 20 degrees re midline. Bursts from the loudspeakers were separated by interstimulus onset intervals (ISO-Is) between 0 and 50 msec. In one condition, uncorrelated noise was produced by separate generators; in a second condition (correlated noise), the signal from one generator was split and led to each speaker. Ss classified their experience of each presentation into one of five defined categories:: (1) single non-moving sound image; (2) 2 stationary but spatially distinct sound images; (3) single sound moving from lead to lag source; (4) as (3) but motion interrupted or broken; and (5) 2 successive sound images, with no apparent motion. In addition, Ss indicated direction (L-R; R-L) of any apparent motion. At 0 msec ISOI, directional judgments with either correlated or uncorrelated bursts were at or near chance level, as expected, and with correlated noises a single image was usually (71%) experienced, presumably at an apparent location at or near the midline. But with uncorrelated noises, 2 simultaneous but distinct sound images were usually (68%) perceived. At 2 msec ISOI, a weak precedence effect was exhibited for correlated noise, where the \"single\" response was often (55%) made; but even here the effect of the second burst was not \"suppressed\" entirely since direction judgments were 83% accurate. At 4 msec ISOI, \"single\" responses had declined to 36% for correlated and to 6% for uncorrelated noises, while by 8+ msec, \"single\" responses were dominated more or less completely by perceptions of dual sources. We conclude that the precedence effect is often confined to extremely brief ISOIs, and that the parameters of stimulus duration and complexity, of rise-fall times, absolute placement and angular separation of sound sources, subject differences, and a variety of types of perceptual experiences need to be addressed experimentally before the existence region of the precedence effect is well defined or uncritically accepted; and that it is too soon to attempt to posit neurophysiological mechanisms in explaining the phenomenon.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"59-72"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14572317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Auditory localization in a free field using discrimination procedures.","authors":"L F Elfner,&nbsp;W R Howse","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A rotating boom positioned a loudspeaker at ear height at a distance of 4 ft from the center of the head of S, who was seated in a darkened large anechoic chamber (684 ft); 750-msec bursts of pink noise, separated by 3.25 sec, at 54 db SPL, were presented. During the interstimulus interval the speaker was moved cw or ccw in the presence of a masking noise at 73 db SPL. Practiced young adults (2F, 1 M) judged azimuth \"same\" or \"different\"; minimum discriminable angle (MDA) was taken as P(c) = .70, corrected for false alarms (judgments \"s\" or \"d\" with no movement). Standard azimuths relative to S were at the 8 cardinal points. MDAs were best at 0 degree (c. 4.5 degrees) but were still relatively good (c. 8.5 degrees) at 180 degrees. In general, MDAs were poorer in the rear quadrants. One S excelled at MDA and exhibited the lowest false alarm rate. The effect of the masker, and random selection of standard and azimuth and of comparison stimuli at every trial, help explain the rather large MDAs compared with the minimum audible angles in the literature. The rather large determination at 90 degrees azimuth as determined by Mills (1958) was not found in these data.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14573433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of warble-tone frequency deviation on threshold measurement in cases with sloping audiometric configurations.","authors":"C Lundeen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A 2.1-kc/s pure-tone (p-t) mask at 80 db SPL created for 7 normal-hearing young adults a hearing threshold configuration which sloped sharply in the 2-kc/s frequency region. Conventional masked audiometry at 1, 1.5, and 2 kc/s was performed with pure tones and with tones sinusoidally modulated at 20 c/s by +/- 5, 10, and 20%. In frequency regions where the masked audiogram was relatively flat, p-t and warble-tone (w-t) HTLs were equivalent. However, at 2 kc/s, w-t HTLs were substantially better (as much as 32 db) than p-t HTLs. The w-t vs p-t discrepancy increased with frequency deviation from 5-20%, attributable to the spread of modulated signal energy into frequency regions where hearing sensitivity was better than at the nominal test frequency. Clinicians should be alert to the possibility that testing with warbled tones may underestimate the amount of hearing loss for pure tones in those with sloping audiometric configurations.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"23-36"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14573435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Speech reception thresholds for digits.","authors":"F Rudmin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Of every 10 Canadians, 4 do not speak English as a first language. With non-native speakers of English, SRT testing using spondaic words lists, after the fashion in the U.S.A., may be difficult or invalid. This study examined the viability of using a closed set of English digits (1, 2, 4, 5, 9) for SRT testing in a Canadian setting. Ss were 130 consecutive patients referred for audiologic assessment in an English hospital in Montreal. Approximately 1/3 were native English, 1/3 native French, and 1/3 with other ethnic languages. Digit SRTs by a 10-db-down and 5-db-up procedure correlated very highly with both the standard 3-frequency (.5, 1, 2 kc/s) pure-tone average HTL (r = .94) and the Fletcher average of the 2 best speech-frequency pure-tone HTLs (r = .96). This study concluded that serial digits are viable SRT testing material for Canadian speech audiometry and should be studied for application to other multilingual populations.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"27 1","pages":"15-21"},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14573434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of stimulus polarity on far-field auditory-evoked electrical responses in the chick.","authors":"H M Brown-Borg,&nbsp;M M Beck,&nbsp;T A Jones","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The effects of inverting click phase on far-field peripheral and brainstem auditory-evoked responses (PBARs) were examined in 8 White Leghorn chicks of age 3 wks. Significant latency differences occurred in all major positive peaks (Pla, P2a peripheral; P3a central) in response to rarefaction vs condensation clicks of equal intensity, with condensation clicks producing the shortest latencies (latency differences: Pla = 0.374, P2a = 0.372 and P3a = 0.352 msec, p less than .001). The mean latency shift corresponds to an equivalent sine wave frequency of approximately 1360 c/s, a value close to the spectral peak energy of the click. No differences in interpeak latency values were found nor any significant amplitude effects.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"26 4","pages":"255-60"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14561260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The prevention of noise-induced hearing loss in the school-aged population: a school educational hearing conservation program.","authors":"N J Lass,&nbsp;C M Woodford,&nbsp;C Lundeen,&nbsp;D J Lundeen,&nbsp;D S Everly-Myers","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A questionnaire assessing knowledge of hearing and hearing loss, and planned hearing conservation practices, was collected from 71 high school students before and after an educational hearing conservation program (HCP) consisting of a film, a lecture and a handout. An average increase of 16.7% correct responses from pre- to postexposure to the HCP was found. Moreover, substantial percentages of respondents stated that they now plan to use hearing protection devices and procedures, when appropriate, and about 80% stated they found the HCP helpful to them.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"26 4","pages":"247-54"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14561259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bisensory vs summed-unisensory improvement on two speech-reception tasks.","authors":"A Wilhite,&nbsp;J E Dancer,&nbsp;H Rozema","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>It is known that in speech reception tasks, when performance scores in the auditory-only (A) mode and the visual-only (V) mode are simply added, the result will be substantially less than when eyes and ears can simultaneously process the stimuli (A/V mode). However, it is not known whether the improvement with practice and/or training with feedback is greater in the A+V or the A/V mode. Normal young adults (N:20) watched and listened in the A/V mode and responded to 100 key words in sentences spoken by a man on a 25-inch color TV at a distance of 6 ft, both before and after training with feedback on other lists of 100 key words. In the training condition, half the Ss were given the A mode first, half the V mode. Within the training condition, pre- and post-training test phases of 100 key words each had a training phase intervening in which feedback was given on 100 different key words. Performance significantly improved from 28.8% to 35.0% words correct within the training condition, averaged over A and V mode (6.2%; p less than .001), but it improved from 68.5% to 86.0% (= 17.5%; p less than .001) in the pre- vs post-training comparison for the A/V mode. The difference of 11.3% in favor of the A/V mode was significant (p less than .01). Essentially zero correlation was found between individual improvements in the A+V vs the A/V mode. The acquisition and utilization of A, V, and A/V skills are independent and specific. Each mode may have its optimum set of training conditions.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"26 4","pages":"279-86"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14561263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of duration on the frequency discrimination of Bobwhite Quail (Colinus virginianus).","authors":"R W Gatehouse,&nbsp;E D Bailey","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In attempting to parcel out the components within calls that may have functional significance or \"message value\", the present study of the series pitted \"best audible\" frequencies of Bobwhite Quail against one another in a frequency discrimination task, and further looked at these frequencies relative to their durational limits. The tasks set for the birds were difficult. In Expers. I and II, 8 adult quail discriminated between frequencies which presumably have independent significance (the 1.0-kc/s of the adult separation call, and the 3.5-kc/s of the chick \"lost\" call) at lessening durations (200-30 msec). In Exper. III, duration discrimination was tested at single frequencies. The tasks were related in several ways to \"real call\" situations like those met by birds under field conditions. Mean frequency discrimination performance was about 75%-correct when the standard and comparison tones were both 200 msec in duration, about 65% when both were at 100 msec, and at chance levels at shorter durations. This was true whether the standard tone remained at 200 msec (Exper. I) or was shortened along with the comparison tone. The limit of durational discrimination at both peak frequencies was also of the order of 100 msec. Thus, quail can discriminate the frequency of peak frequency signals that vary in duration down to a limit of 100 msec., but as the task becomes more difficult (i.e., reduced duration or similar frequency content) decreased sensitivity might have to be offset by enhancement of other signal parameters.</p>","PeriodicalId":76646,"journal":{"name":"The Journal of auditory research","volume":"26 4","pages":"267-78"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14561262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}