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Delay of the propagation time of an optoacoustic pulse at the vaporization threshold of liquid carbon disulfide 光声脉冲在液态二硫化碳汽化阈值处传播时间的延迟
Acoustics research letters online : ARLO Pub Date : 2003-06-04 DOI: 10.1121/1.1591711
Stanley A. Cheyne, J. M. Long
{"title":"Delay of the propagation time of an optoacoustic pulse at the vaporization threshold of liquid carbon disulfide","authors":"Stanley A. Cheyne, J. M. Long","doi":"10.1121/1.1591711","DOIUrl":"https://doi.org/10.1121/1.1591711","url":null,"abstract":"The propagation time of an acoustic pulse generated via an optoacoustic technique is analyzed. The propagation time is delayed by approximately 225 ns once a stable bubble is produced due to vaporization of the liquid. Although there is little change in the general spatial and temporal profile of the acoustic wave, it is observed that the time duration is increased near the vaporization threshold of the liquid.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72699490","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: 1
Photoacoustic method for the simultaneous acquisition of optical and ultrasonic spectra 同时获取光学和超声光谱的光声方法
Acoustics research letters online : ARLO Pub Date : 2003-05-30 DOI: 10.1121/1.1590936
J. Mobley, T. Vo‐Dinh
{"title":"Photoacoustic method for the simultaneous acquisition of optical and ultrasonic spectra","authors":"J. Mobley, T. Vo‐Dinh","doi":"10.1121/1.1590936","DOIUrl":"https://doi.org/10.1121/1.1590936","url":null,"abstract":"A novel method for the simultaneous acquisition of optical absorption and ultrasonic attenuation spectra is described. The technique is based on the photoacoustic generation of bi-directional ultrasonic pulses by a thin optical absorber that is remote from the sample. A single piezoelectric transducer ultimately detects the two pulses of ultrasound, and the captured signals are used to determine both the optical absorption and ultrasonic attenuation properties of the sample. Measurements on a polycarbonate resin sample using the simultaneous photoacoustic method and conventional techniques show good agreement, indicating the validity of the method.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81662945","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: 6
Songlike vocalizations from the Sumatran Rhinoceros (Dicerorhinus sumatrensis) 苏门答腊犀牛(Dicerorhinus sumatrensis)的鸣声
Acoustics research letters online : ARLO Pub Date : 2003-05-21 DOI: 10.1121/1.1588271
Elizabeth von Muggenthaler, P. Reinhart, Brad Lympany, R. Craft
{"title":"Songlike vocalizations from the Sumatran Rhinoceros (Dicerorhinus sumatrensis)","authors":"Elizabeth von Muggenthaler, P. Reinhart, Brad Lympany, R. Craft","doi":"10.1121/1.1588271","DOIUrl":"https://doi.org/10.1121/1.1588271","url":null,"abstract":"There are only 200 to 300 Sumatran rhinos (Dicermoceros sumatrensis) left in the world. Sumatran rhinos are solitary, and their native habitat is dense tropical forest and mountain moss forest. Three Sumatran rhinos, housed at the Cincinnati Zoo, were recorded using Statham Radio microphones and Sony TCD-D8 DAT recorders. Sumatran rhinos produce sounds described as eeps, 70 Hz–4 kHz (57–92 dB); whales, 100 Hz–3.2 kHz (87 dB); and whistle-blows, 17 Hz–8 kHz (100 dB). The whistle-blows contain high level infrasound that would be advantageous for use in the rhino’s forest habitat. Some Sumatran rhino vocalizations resemble humpback whale signals.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86856347","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: 16
Measurement of audience seat absorption for use in geometrical acoustics software 几何声学软件中听众座位吸收度的测量
Acoustics research letters online : ARLO Pub Date : 2003-05-05 DOI: 10.1121/1.1582072
J. Summers
{"title":"Measurement of audience seat absorption for use in geometrical acoustics software","authors":"J. Summers","doi":"10.1121/1.1582072","DOIUrl":"https://doi.org/10.1121/1.1582072","url":null,"abstract":"Systematic errors in the high frequency predictions of geometrical acoustics software can result from the use of seat absorption coefficients derived by traditional measurement methods based on diffuse-field assumptions. This analysis treats in-situ measurement methods in which seat absorption coefficients are calculated by a diffuse-field model from reverberation time measurements made in auditoria. Computer models illustrate that the nonuniform distributions of absorption in auditoria result in significant differences between the absorption coefficients derived by an in-situ measurement method and the true random-incidence absorption coefficients. Proposals are made for methods to be used when measuring seat absorption coefficients for use in geometrical acoustics software.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76726373","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: 8
Analysis and effectiveness of deer whistles for motor vehicles: frequencies, levels, and animal threshold responses 机动车鹿哨的分析和有效性:频率、水平和动物阈值反应
Acoustics research letters online : ARLO Pub Date : 2003-05-01 DOI: 10.1121/1.1582071
P. Scheifele, D. Browning, Lesa M. Collins-Scheifele
{"title":"Analysis and effectiveness of deer whistles for motor vehicles: frequencies, levels, and animal threshold responses","authors":"P. Scheifele, D. Browning, Lesa M. Collins-Scheifele","doi":"10.1121/1.1582071","DOIUrl":"https://doi.org/10.1121/1.1582071","url":null,"abstract":"Whitetail deer (Odocileus virginianus) are common across much of the United States. In areas where deer populations are prevalent, there is a propensity for interactions with automobiles. Various methods have been suggested for reducing the number of automobile-deer collisions, including acoustic devices such as deer whistles. Six different whistles were tested in the laboratory and on motor vehicles. Frequencies and intensities generated by the devices when mounted on vehicles at speeds from 30–45 miles per hour were determined. The primary frequency of operation of the closed end whistles on vehicles was determined to be approximately 3.3 kHz with little variation with changes in air pressure. Open-end whistles had a primary frequency of about 12 kHz, with significant variation with changes in air pressure. The best frequency range of hearing for whitetail deer appears to be between 2 and 6 kHz. The effectiveness of these devices was concluded based on the comparison of the acoustical attributes of the devices to deer hearing thresholds and acoustic behavior.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80139240","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: 42
Illusory conjunctions of musical pitch and timbre 音高和音色的虚幻连接
Acoustics research letters online : ARLO Pub Date : 2003-04-21 DOI: 10.1121/1.1578951
M. D. Hall, Kimberly Wieberg
{"title":"Illusory conjunctions of musical pitch and timbre","authors":"M. D. Hall, Kimberly Wieberg","doi":"10.1121/1.1578951","DOIUrl":"https://doi.org/10.1121/1.1578951","url":null,"abstract":"An experiment addressed perceptual assumptions that have formed the basis of models for auditory feature integration. Musicians searched stimuli containing two lateralized tones for a target timbre and its pitch. Errors representing potential illusory conjunctions exceeded feature misperception errors. Responses were submitted to multinomial models to evaluate the contribution of guessing, illusory conjunctions, and intertone distance. Illusory conjunction models provided the most accurate data fits. Illusory conjunction rates exceeded zero, and were not affected by distance. Implications for feature binding models are discussed.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82487059","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: 5
Digital implementation of linear gammatone filters: Comparison of design methods 线性伽玛酮滤波器的数字化实现:设计方法的比较
Acoustics research letters online : ARLO Pub Date : 2003-04-02 DOI: 10.1121/1.1573131
L. V. Immerseel, S. Peeters
{"title":"Digital implementation of linear gammatone filters: Comparison of design methods","authors":"L. V. Immerseel, S. Peeters","doi":"10.1121/1.1573131","DOIUrl":"https://doi.org/10.1121/1.1573131","url":null,"abstract":"Digital implementations of linear gammatone filters are regularly part of auditory models and can be used in the sound processing in cochlear implants. How close digital impulse, magnitude, and phase responses match the corresponding properties of the analog gammatone filter is evaluated for one, finite-impulse response filter design, and for five, infinite-impulse response filter designs: base-band impulse invariant transformation, impulse invariant transformation, matched z transformation, bilinear transformation, and mapping of differentials with backward differences. Filter properties and computational cost are compared as a function of the filter’s order and center frequency, and sampling frequency. Results show that filters designed with the base-band impulse invariant transformation give the best overall approximation of the analog properties with reasonable computational cost.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81628210","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: 35
Middle-ear transmission in humans: wide-band, not frequency-tuned? 人类中耳传播:宽带，非频率调谐?
Acoustics research letters online : ARLO Pub Date : 2003-03-03 DOI: 10.1121/1.1566924
Mario A Ruggero, Andrei N Temchin
{"title":"Middle-ear transmission in humans: wide-band, not frequency-tuned?","authors":"Mario A Ruggero,&nbsp;Andrei N Temchin","doi":"10.1121/1.1566924","DOIUrl":"https://doi.org/10.1121/1.1566924","url":null,"abstract":"<p><p>Postmortem and in vivo vibration responses to sound of the stapes and the umbo of human ears are surveyed. The magnitudes of umbo velocity responses recorded postmortem decay between 1 and 5 or 10 kHz at rates between 0 and -3 dB/octave. In contrast, the magnitudes of in vivo umbo vibration are relatively invariant over a wide frequency range, amply exceeding the bandwidth of the audiogram according to one report. Similarly, most studies of postmortem stapes vibration report velocities tuned to about 1 kHz, with magnitudes that decay at a rate of about -6 dB/octave at higher frequencies. In contrast, in vivo stapes responses are apparently only mildly tuned. We conjecture that the bandwidth of stapes vibration velocity in humans will eventually be shown to exceed the bandwidth of the audiogram, in line with findings in other amniotic vertebrates.</p>","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1121/1.1566924","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26725805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Improved sound separation using three loudspeakers 使用三个扬声器改善声音分离
Acoustics research letters online : ARLO Pub Date : 2003-02-27 DOI: 10.1121/1.1566419
Jun Yang, W. Gan, See-Ee Tan
{"title":"Improved sound separation using three loudspeakers","authors":"Jun Yang, W. Gan, See-Ee Tan","doi":"10.1121/1.1566419","DOIUrl":"https://doi.org/10.1121/1.1566419","url":null,"abstract":"In a virtual sound imaging system, crosstalk cancellation filters are used to create an effective sweet spot for 3D sound reproduction via multiple loudspeakers. A new 3-channel system is proposed to improve system performance on sound separation. Based on the robustness analysis of a crosstalk canceller, a modified-inverse filter technique is explored and demonstrated using two different examples of symmetric speaker positions. The simulation results indicate that the present system is robust over a wider bandwidth compared to a conventional 2-channel system.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85769021","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: 17
High-frequency thermoacoustic-Stirling heat engine demonstration device 高频热声-斯特林热机演示装置
Acoustics research letters online : ARLO Pub Date : 2003-01-28 DOI: 10.1121/1.1558931
Kevin J. Bastyr, R. Keolian
{"title":"High-frequency thermoacoustic-Stirling heat engine demonstration device","authors":"Kevin J. Bastyr, R. Keolian","doi":"10.1121/1.1558931","DOIUrl":"https://doi.org/10.1121/1.1558931","url":null,"abstract":"A small thermoacoustic-Stirling engine demonstration device that can produce sound in excess of 100 dB at 560 Hz has been constructed. The engine consists of a quarter wavelength acoustic resonator with a smaller diameter coaxial regenerator positioned toward the resonator’s closed end, thereby forming an acoustic feedback path around the regenerator. Acoustic oscillations begin spontaneously when the hot heat exchanger adjoining one end of the regenerator is heated to a sufficient temperature. A water stream in a second heat exchanger maintains the opposite end of the regenerator near ambient temperature. This device was inspired by the Backhaus-Swift engine and is a preliminary step in the investigation of regenerator operation at frequencies much higher than may be practical with mechanical or free-piston Stirling engines.","PeriodicalId":87384,"journal":{"name":"Acoustics research letters online : ARLO","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76784163","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: 19
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