Sound-Recording Systems for Measuring Sound Levels During Seismic Surveys

2012 ◽  
pp. 481-484 ◽  
Author(s):  
Jan Tore Øvredal ◽  
Bjorn Totland
Keyword(s):  
Sound Recording ◽  
Seismic Surveys ◽  
Sound Levels

scholarly journals Marine soundscape variation reveals insights into baleen whales and their environment: a case study in central New Zealand

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Victoria E. Warren ◽  
Craig McPherson ◽  
Giacomo Giorli ◽  
Kimberly T. Goetz ◽  
Craig A. Radford
Keyword(s):  
New Zealand ◽  
Integrated Approach ◽  
Baleen Whales ◽  
Seismic Surveys ◽  
Sound Levels ◽  
Minke Whales ◽  
Ambient Sound ◽  
Time Space ◽  
Spatio Temporal ◽  
Free Ranging

Baleen whales reliably produce stereotyped vocalizations, enabling their spatio-temporal distributions to be inferred from acoustic detections. Soundscape analysis provides an integrated approach whereby vocal species, such as baleen whales, are sampled holistically with other acoustic contributors to their environment. Acoustic elements that occur concurrently in space, time and/or frequency can indicate overlaps between free-ranging species and potential stressors. Such information can inform risk assessment framework models. Here, we demonstrate the utility of soundscape monitoring in central New Zealand, an area of high cetacean diversity where potential threats are poorly understood. Pygmy blue whale calls were abundant in the South Taranaki Bight (STB) throughout recording periods and were also detected near Kaikōura during autumn. Humpback, Antarctic blue and Antarctic minke whales were detected in winter and spring, during migration. Wind, rain, tidal and wave activity increased ambient sound levels in both deep- and shallow-water environments across a broad range of frequencies, including those used by baleen whales, and sound from shipping, seismic surveys and earthquakes overlapped in time, space and frequency with whale calls. The results highlight the feasibility of soundscape analysis to quantify and understand potential stressors to free-ranging species, which is essential for conservation and management decisions.

Sound Levels Emitted by Children's Toys

1998 ◽  
Vol 25 (Spring) ◽  
pp. 41-44 ◽  
Author(s):  
John W. Hawks
Keyword(s):  
Sound Levels

The Take and the Stutter: Glenn Gould's Time Synthesis

2015 ◽  
Vol 9 (4) ◽  
pp. 558-577
Author(s):  
Mickey Vallee
Keyword(s):  
Sensory Experience ◽  
Sound Recording ◽  
Deleuze And Guattari ◽  
Concert Hall ◽  
The Third ◽  
Passive Synthesis ◽  
Recording Studios ◽  
Recorded Performance

In A Thousand Plateaus, Deleuze and Guattari refer to Glenn Gould as an illustration of the third principle of the rhizome, that of multiplicity: ‘When Glenn Gould speeds up the performance of a piece, he is not just displaying virtuosity, he is transforming the musical points into lines, he is making the whole piece proliferate’ (1987: 8). In an attempt to make sensible their ostensibly modest statement, I proliferate the relationships between Glenn Gould's philosophy of sound recording, Deleuze's theory of passive synthesis, and Deleuze and Guattari's concept of the stutter. I argue, ultimately, that Glenn Gould's radical recording practice stutters and deterritorialises the temporality of the recorded performance. More generally, the Deleuzian perspective broadens the scope of Gould's aesthetic practices that highlights the importance of aesthetic acts in the redistribution of sensory experience. But the study serves a broader purpose than celebrating a pianist/recordist that Deleuze admired. Rather, while his contemporaries began to use the studio as a compositional element in sound recording, Gould bypassed such a step towards the informational logics of recording studios. Thus, it is inappropriate to think of Gould as having immersed himself in ‘technology’ than the broader concept of a complex, one that redistributed the striated listening space of the concert hall.

Verification of the Calculation Assumptions Applied to Solutions of the Acoustic Measurements Uncertainty

2015 ◽  
Vol 39 (2) ◽  
pp. 199-202
Author(s):  
Wojciech Batko ◽  
Renata Bal
Keyword(s):  
Normal Distribution ◽  
Confidence Intervals ◽  
Uncertainty Of Measurement ◽  
Acoustic Measurements ◽  
Uncertainty In Measurement ◽  
Sound Levels ◽  
Measurement Results ◽  
Analysis Of Results ◽  
Essential Problem ◽  
Expression Of Uncertainty

Abstract The assessment of the uncertainty of measurement results, an essential problem in environmental acoustic investigations, is undertaken in the paper. An attention is drawn to the - usually omitted - problem of the verification of assumptions related to using the classic methods of the confidence intervals estimation, for the controlled measuring quantity. Especially the paper directs attention to the need of the verification of the assumption of the normal distribution of the measuring quantity set, being the base for the existing and binding procedures of the acoustic measurements assessment uncertainty. The essence of the undertaken problem concerns the binding legal and standard acts related to acoustic measurements and recommended in: 'Guide to the expression of uncertainty in measurement' (GUM) (OIML 1993), developed under the aegis of the International Bureau of Measures (BIPM). The model legitimacy of the hypothesis of the normal distribution of the measuring quantity set in acoustic measurements is discussed and supplemented by testing its likelihood on the environment acoustic results. The Jarque-Bery test based on skewness and flattening (curtosis) distribution measures was used for the analysis of results verifying the assumption. This test allows for the simultaneous analysis of the deviation from the normal distribution caused both by its skewness and flattening. The performed experiments concerned analyses of the distribution of sound levels: LD, LE, LN, LDWN, being the basic noise indicators in assessments of the environment acoustic hazards.

Using 4D Seismic Surveys and History Matching to Estimate Critical and Maximum Gas Saturation

2014 ◽  
Author(s):  
Dennis Chinedu Obidegwu ◽  
Romain Louis Chassagne ◽  
Colin Macbeth
Keyword(s):  
History Matching ◽  
Seismic Surveys ◽  
Gas Saturation ◽  
4D Seismic

Case study: Prediction and field tests of railway noise and effects of a low-height noise barrier

2020 ◽  
Vol 68 (4) ◽  
pp. 303-314
Author(s):  
Yuna Park ◽  
Hyo-In Koh ◽  
University of Science and Technology, Transpo ◽  
University of Science and Technology, Transpo ◽  
University of Science and Technology, Transpo ◽  
...  
Keyword(s):  
High Speed ◽  
Field Tests ◽  
Residential Areas ◽  
Railway Systems ◽  
Railway Noise ◽  
Sound Levels ◽  
Noise Barrier ◽  
The Difference ◽  
Reduction Effect ◽  
The Impact

Railway noise is calculated to predict the impact of new or reconstructed railway tracks on nearby residential areas. The results are used to prepare adequate counter- measures, and the calculation results are directly related to the cost of the action plans. The calculated values were used to produce noise maps for each area of inter- est. The Schall 03 2012 is one of the most frequently used methods for the production of noise maps. The latest version was released in 2012 and uses various input para- meters associated with the latest rail vehicles and track systems in Germany. This version has not been sufficiently used in South Korea, and there is a lack of standard guidelines and a precise manual for Korean railway systems. Thus, it is not clear what input parameters will match specific local cases. This study investigates the modeling procedure for Korean railway systems and the differences between calcu- lated railway sound levels and measured values obtained using the Schall 03 2012 model. Depending on the location of sound receivers, the difference between the cal- culated and measured values was within approximately 4 dB for various train types. In the case of high-speed trains, the value was approximately 7 dB. A noise-reducing measure was also modeled. The noise reduction effect of a low-height noise barrier system was predicted and evaluated for operating railway sites within the frame- work of a national research project in Korea. The comparison of calculated and measured values showed differences within 2.5 dB.

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