The Journal of the Acoustical Society of America最新文献_第5页

Undergraduate engineering education with hands-on experimental acoustic field work 本科生工程学教育与声学现场实验工作相结合

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0022795

Jeff Foeller, Andrea Vecchiotti, D. Turo, J. Vignola, Teresa J. Ryan

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Protecting beyond the bone-conduction limit: Lessons learned developing and fielding a passive Hearing Protection Helmet 超越骨传导极限的保护：开发和实战被动式听力保护头盔的经验教训

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023757

J. Wilbur, Lindsay Allen, W. Audette, Christian Passow, Jacob VanMalden, James Arsenault, Jonathan Hamilton, Kimberly Gould, Tiffany Lei, John Farnese, Sienna Pollock, Robert Kline Schoder

{"title":"Protecting beyond the bone-conduction limit: Lessons learned developing and fielding a passive Hearing Protection Helmet","authors":"J. Wilbur, Lindsay Allen, W. Audette, Christian Passow, Jacob VanMalden, James Arsenault, Jonathan Hamilton, Kimberly Gould, Tiffany Lei, John Farnese, Sienna Pollock, Robert Kline Schoder","doi":"10.1121/10.0023757","DOIUrl":"https://doi.org/10.1121/10.0023757","url":null,"abstract":"Traditional hearing protection devices focus on attenuating air-conducted sound and are limited by the bone conduction threshold (Berger, 1983). In extreme noise fields, such as aircraft maintainers operating near jet engines on aircraft carriers, the bone conducted pathway carries sufficient energy to damage the cochlea. Here, we describe the development, qualification, and field-testing of a passive Hearing Protection Helmet (HPH) designed to surpass the bone conduction limit. The HPH features a noise-isolating shell sealed to the head via a compliant edge seal. When worn with foam earplugs and tested to ANSI S12.6-2016 (Experimenter Fit), the Noise Reduction Rating (NRR) of the HPH is 38 dB and the Noise Reduction Statistic (NRSA) (ANSI S12.68) (80% to 20% of users) is 45 to 52 dB. We also describe challenges associated with user acceptance of the HPH. User feedback led to the integration of an electronic hear-through system to restore auditory situational awareness. Users also rejected wired communication-enabled ear plugs, resulting in the integration of ear cup speakers and adding challenges associated with setting the hear-through sound pressure level limits. We conclude with anecdotes from trial deployments aboard U.S. Navy Aircraft Carriers in 2020, 2022, and 2023.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325188","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}

引用次数: 0

The frequency modulation transfer function provides supplemental measures for the objective evaluation of pitch extractors 频率调制传递函数为客观评估音调提取器提供了补充措施

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023432

Hideki Kawahara, Ken-Ichi Sakakibara, Kohei Yatabe

引用次数: 0

Unveiling weak auditory evoked potentials using data-driven filtering 利用数据驱动过滤揭示弱听觉诱发电位

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023054

Stefan Jacob, Christian Koch

引用次数: 0

The effect of cant angle on the sound production of mutually inclined rectangular supersonic jets 倾斜角对相互倾斜的矩形超音速喷流发声的影响

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023682

Daniel Edgington-Mitchell, Joel L. Weightman, Petronio Nogueira

引用次数: 0

An electroglottographic study on the effect of following context on glottal constriction in Australian English coda /t/ 关于澳大利亚英语尾音 /t/ 的后续语境对声门收缩影响的电子喉音研究

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023425

Louise Ratko, Joshua Penney, Felicity Cox

{"title":"An electroglottographic study on the effect of following context on glottal constriction in Australian English coda /t/","authors":"Louise Ratko, Joshua Penney, Felicity Cox","doi":"10.1121/10.0023425","DOIUrl":"https://doi.org/10.1121/10.0023425","url":null,"abstract":"To achieve inhibition of voicing for voiceless speech sounds, the glottis may be either spread or constricted. Glottal spreading may lead to breathiness, and constriction to glottalization. Previous research has shown that glottalization associated with English coda /t/ differs as a function of surrounding environment, with glottalization more likely when the following word begins with a sonorant consonant (such as /l, n/) compared to other environments. However, it is unclear the extent to which following sonorant consonants induce glottalization compared to following vowels. We used an electroglottograph to record 12 Australian English speakers producing phrases eliciting coda /t/ in target words preceding words with onset sonorants /n, l/ (now, long) and onset vowels /əʉ, ə/ (only, again). Open quotient (OQ) was established through the second half of the target word vowel. Increasing OQ indicates breathiness whereas lowering OQ indicates constriction. Using generalized additive mixed modelling we found that the OQ of vowels preceding coda /t/ in the sonorant-following context was significantly lower than in vowel-following contexts. This indicates greater glottal constriction when a sonorant consonant follows the coda /t/, showing that coda /t/ voicelessness is implemented differently before sonorant consonants compared to vowels","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325551","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}

引用次数: 0

(Re-)exploring the normal modes of axisymmetric structures: An English church bell case study (重新）探索轴对称结构的正常模式：英国教堂大钟案例研究

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0022843

Robert Perrin, Benjamin J. Halkon, Zimu Guo

{"title":"(Re-)exploring the normal modes of axisymmetric structures: An English church bell case study","authors":"Robert Perrin, Benjamin J. Halkon, Zimu Guo","doi":"10.1121/10.0022843","DOIUrl":"https://doi.org/10.1121/10.0022843","url":null,"abstract":"The normal modes of axisymmetric structures are of interest to structural engineers, physicists and musical acousticians. Previously, some of the present authors have made studies of church bells, hand bells, elephant bells, various gongs and rings. Group theoretical arguments have been used, with considerable success, in classifying the normal modes of these structures and in understanding how “beats” arise from split degenerate doublets. It is now pointed out that further information can be obtained from group theory using a variety of additional arguments. In particular, it infers a basic distinction between “in-extensional” and “extensional” types of modes. In the present work, we concentrate on the case of an English church bell, as an example axisymmetric structure, whose normal modes were previously measured in a frequency range of up to about 10 kHz. In that earlier work, the results were analyzed with what was then considered a state-of-the-art finite-element package. We now repeat this exercise with a modern finite-element package to explore the differences between the types of modes and validate the Group theory observations. The agreement with experiment is much improved and some new level of understanding of the spectrum of the bell is achieved.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325696","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}

引用次数: 0

Robust power spectral density estimation via a performance-weighted blend of order statistics 通过性能加权混合阶次统计进行鲁棒功率谱密度估计

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023303

David C. Anchieta, John Buck

{"title":"Robust power spectral density estimation via a performance-weighted blend of order statistics","authors":"David C. Anchieta, John Buck","doi":"10.1121/10.0023303","DOIUrl":"https://doi.org/10.1121/10.0023303","url":null,"abstract":"Loud transients introduce bias to background spectrum estimates based on the sample mean, like the Welch Overlapped Segment Averaging (WOSA) [1967]. The Schwock and Abadi [2021] Welch Percentile (SAWP) estimator avoids the loud transient bias by replacing the averaging of the WOSA with a scaled order statistic (OS) of the sample power spectrum. While the scaling ensures the SAWP is unbiased regardless of which OS is chosen, the 80th percentile minimizes the variance of the SAWP estimator in a scenario without loud transients. However, the 80th percentile SAWP is still vulnerable to bias and increased variance from more frequent loud transients. Also, the rate of occurrence of loud transients may change with time, requiring the SAWP to adapt which percentile is used. To approach this challenge, this talk proposes a Universal SAWP estimator which is a weighted sum across different fixed percentile SAWP estimators. At each iteration, the Universal SAWP updates the blend weights to promote the percentile with the lowest sample variance over recent observations. In computer simulations, the Universal SAWP quickly assigns higher weights to the lowest variance estimators as the occurrence of loud transients increases. Overall, the Universal SAWP achieves equal or lower variance as the best fixed percentile SAWP estimator. [Work supported by ONR Code 321US.]","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"191 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325792","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}

引用次数: 0

Identification training adapted to the learner’s vowel space aids in improving native Japanese speakers’ pronunciation of American English vowels 适应学习者元音空间的识别训练有助于提高日语母语者的美式英语元音发音水平

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023265

William Martens, S. Lambacher

{"title":"Identification training adapted to the learner’s vowel space aids in improving native Japanese speakers’ pronunciation of American English vowels","authors":"William Martens, S. Lambacher","doi":"10.1121/10.0023265","DOIUrl":"https://doi.org/10.1121/10.0023265","url":null,"abstract":"Native speakers of Japanese learning English as a foreign language often have difficulty pronouncing certain American English (AE) vowels, such as the mid vowels /ae/, /ɑ/, / ^/, /ɔ/, and /ɚ/, which typically are assimilated to native vowel categories. It was shown that vowel identification training which was adapted to the learner’s vowel space could aid in improving the native Japanese speakers’ pronunciation of a set of 12 AE vowels that included the 5 more difficult mid vowels. Estimates of the vocal-tract length (VTL) for 53 learners were based upon the central tendency and range of the four lowest formant frequencies observed in their recordings of five short statements in the Japanese language. Having thus characterized the individual vowel spaces of 53 learners, 33 were placed in a “longer-VTL” group while the remaining 20 were placed in a “shorter-VTL” group. Those in the “longer-VTL” group were given periodic identification training using examples of 12 American English monophthongs in a consonant-vowel-consonant (CVC) context that sounded as if a male AE speaker with similar VTL had uttered them. The “shorter-VTL” learners heard training examples that sounded as if the CVCs were uttered by a female AE speaker with similarly short VTL.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325794","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}

引用次数: 0

Two efforts towards natural speech synthesis: Incorporating disfluency and speaking style change based on the interlocutor 实现自然语音合成的两项努力：根据对话者纳入不流畅和说话风格变化

The Journal of the Acoustical Society of America Pub Date : 2023-10-01 DOI: 10.1121/10.0023286

Akiko Mokhtari, Nick Campbell, Toshiyuki Sadanobu

{"title":"Two efforts towards natural speech synthesis: Incorporating disfluency and speaking style change based on the interlocutor","authors":"Akiko Mokhtari, Nick Campbell, Toshiyuki Sadanobu","doi":"10.1121/10.0023286","DOIUrl":"https://doi.org/10.1121/10.0023286","url":null,"abstract":"During the period 2000–2005, a Japanese female speaker recorded her everyday conversations with many different interlocutors using a head-set microphone. As a result, 600 hours of natural Japanese speech data were obtained. This study describes a DNN-based speech synthesis system which was trained on 300 hours of the data, focusing on two unique efforts to make it more expressive in a human-like way: (1) allowing for disfluencies, and (2) accounting for the category of interlocutor. Incorporating some frequently observed disfluent patterns in general Japanese speech such as fillers, phrase-final rising intonation, and word-internal prolongation or suspension, is believed to be effective in practical application as certain disfluencies are connected to a speaker’s attitude in Japanese communication. For example, having word-internal prolongations can show hesitation or politeness, and word-internal suspending can show the speaker’s surprised attitude. Interlocutors in the original data were categorized into four groups: family, friend, child and others. This information was used in the training process, and as a result, the synthesizer can generate different speaking styles according to the interlocutor setting. Being able to generate disfluent speech and change the speaking style depending on who you are talking to can make the synthesizer ever more expressive.","PeriodicalId":256727,"journal":{"name":"The Journal of the Acoustical Society of America","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139325821","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}

引用次数: 0