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Advances in the calculation of compressive strength from acoustic measurements of rock mass samples - examples of calculations

Chrzan Tadeusz, Szymanowicz Sławomir

Advances in Science and Technology. Research Journal

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2025

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Vol. 19, no. 8

384--394

EN

The properties of the rock mass, such as compressive strength and deformability of rocks, also have a direct impact on mining technology, the machinery used and its efficiency. For many years, work has been carried out on the widespread use of the ultrasonic method for determining rock strength properties. This method is characterized by simplicity of measurement and its accuracy increasing with the number of measurements. A very important advantage of this method is the possibility of multiple measurements, the short duration of the measurements and the almost immediate results, which can be presented in the form of a curve reflecting the relationship between compressive strength and the measured acoustic parameters. The article describes the development of research and the relationship between compressive strength and acoustic parameters such as volume density, longitudinal wave velocity and the product of volume density and longitudinal wave velocity. The analyses demonstrated the accuracy of the calculations based on the value of the coefficient of determination (R2). A new relationship between compressive strength and acoustic modulus was presented, and it has the highest accuracy. It was proposed that this new method can be used to calculate the compressive strength of all brittle materials using acoustic modulus.

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Acoustic aspects of the Goseck Circle area

Suder-Dębska Katarzyna

Vibrations in Physical Systems

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2024

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Vol. 35, nr 2

art. no. 2024213

EN

This article presents a study conducted to evaluate the acoustic quality of the Goseck Circle, an ancient circular enclosure, also known as a rondel, situated in Saxony, Germany. Goseck Circle is an example of monumental buildings from the Neolithic period, which are called rondels. The facility was discovered in the 1990s. Then the facility was archaeologically reconstructed and opened to the public in 2005. Currently, it is considered to be the oldest known structure of this type, and its creation is estimated at around 4900 BC. Goseck Circle is roughly of a circular shape. It has one ditch and two palisade rings. There are three entrances leading to the interior of this facility. Therefore, the Goseck Circle is considered as the oldest solar observatory, as a worship, or a ritual place. A number of studies on both contemporary and archaeological facilities indicate that the facilities display the characteristic features depending on their intended use. Therefore, it can be assumed that if the Goseck Circle was to be a place of worship, then in terms of the acoustic aspects, it should be characterized by such values of the acoustic parameters, that will also prove this. This concept was the reason for carrying out a series of numerical calculations that allowed for the determining of the selected parameters characterizing the acoustic field inside the analysed facility.

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Classification and prediction of benthic habitat based on scientific echosounder data: application of machine learning algorithms

Hamuna Baigo, Pujiyati Sri, Gaol Jonson Lumban, Hestirianoto Totok

Applied Computer Science

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2024

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Vol. 20, no. 4

100--116

EN

This study aims to map three main benthic habitats (coral, seagrass, and sand) in Kapota Atoll (Wakatobi, Indonesia) using a single-beam echosounder (SBES) Simrad EK15. The acoustic data were processed using Sonar5-Pro software. Eight acoustic parameters were used as input for the classification and prediction of benthic habitats, including depth (D), five acoustic parameters of the first echo (BD, BP, AttSv1, DecSv1, and AttDecSv1), and cumulative energy of the second and third echoes (AttDecSv2 and AttDecSv3). The classification and prediction process of benthic habitats uses two machine learning algorithms, Random Forest (RF) and Support Vector Machine (SVM), in XLSTAT Basic+ software. The study results show that 49 combinations of acoustic parameters produce benthic habitat maps that meet the minimum accuracy standards for benthic habitat mapping (≥60%). Using eight acoustic parameters produces a more accurate benthic habitat map than using only two main SBES parameters (DecSv1 and AttDecSv2 parameters or E1 and E2 in the RoxAnn system indicating the roughness and hardness indices). The RF and SVM algorithms produce benthic habitat maps with the highest accuracy of 79.33% and 78.67%, respectively. Each acoustic parameter has a different importance for the classification of benthic habitats, where the order of importance of each acoustic parameter in the overall classification follows the following order: AttDecSv2 > D > DecSv1 > BD > AttDecSv3 > AttSv1 > AttDecSv1 > BP. Overall, using more acoustic parameters can significantly improve the accuracy of benthic habitat maps.

4

Speech Analysis as a Tool for Detection and Monitoring of Medical Conditions : A review

Igras-Cybulska Magdalena, Hemmerling Daria, Ziółko Mariusz, Datka Wojciech, Stogowska Ewa, Kucharski Michał, Rzepka Rafał, Ziółko Bartosz

Archives of Acoustics

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2023

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Vol. 48, No. 3

289--315

EN

The goal of this article is to present and compare recent approaches which use speech and voice analysis as biomarkers for screening tests and monitoring of some diseases. The article takes into account metabolic, respiratory, cardiovascular, endocrine, and nervous system disorders. A selection of articles was performed to identify studies that assess voice features quantitatively in selected disorders by acoustic and linguistic voice analysis. Information was extracted from each paper in order to compare various aspects of datasets, speech parameters, methods of applied analysis and obtained results. 110 research papers were reviewed and 47 databases were summarized. Speech analysis is a promising method for early diagnosis of certain disorders. Advanced computer voice analysis with machine learning algorithms combined with the widespread availability of smartphones allows diagnostic analysis to be conducted during the patient’s visit to the doctor or at the patient’s home during a telephone conversation. Speech analysis is a simple, low-cost, non-invasive and easy-toprovide method of medical diagnosis. These are remarkable advantages, but there are also disadvantages. The effectiveness of disease diagnoses varies from 65% up to 99%. For that reason it should be treated as a medical screening test and should be an indication of the need for classic medical tests.

5

Comparison of Lithuanian and Polish Consonant Phonemes Based on Acoustic Analysis – Preliminary Results

Korvel Gražina, Kurasova Olga, Kostek Bożena

Archives of Acoustics

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2019

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Vol. 44, No. 4

693--707

EN

The goal of this research is to find a set of acoustic parameters that are related to differences between Polish and Lithuanian language consonants. In order to identify these differences, an acoustic analysis is performed, and the phoneme sounds are described as the vectors of acoustic parameters. Parameters known from the speech domain as well as those from the music information retrieval area are employed. These parameters are time- and frequency-domain descriptors. English language as an auxiliary language is used in the experiments. In the first part of the experiments, an analysis of Lithuanian and Polish language samples is carried out, features are extracted, and the most discriminating ones are determined. In the second part of the experiments, automatic classification of Lithuanian/English, Polish/English, and Lithuanian/Polish phonemes is performed.

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Centrum Kongresowe w Krakowie : wielofunkcyjna i wielowymiarowa przestrzeń dla kultury

Mazur M., Karpiński-Rzepa M.

Nowoczesne Budownictwo Inżynieryjne

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2016

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Nr 1

20--22

PL

ICE Kraków (International Conferences and Entertainment Kraków) to wizytówka miasta. Ten nowoczesny obiekt powstał po siedmiu latach prac projektowych i trwającej trzy i pół roku budowie, która ruszyła w październiku 2010 r. Do lipca 2011 r. zakończono jej I etap – głęboką na 16 m ścianę szczelinową, stanowiącą zewnętrzną ścianę konstrukcyjną obiektu i jednocześnie zabezpieczającą przed naporem wód gruntowych. We wrześniu 2011 r. rozpoczęto prace II etapu inwestycji, których generalnym wykonawcą było polsko-hiszpańskie konsorcjum Budimex SA i Ferrovial Agroman SA.

EN

ICE Kraków (International Conferences and Entertainment Kraków) is a showcase of the city. This state-of- the-art facility was built after seven years of design work, and after three and a half years of construction work which started in October 2010. By July 2011, its first stage was completed - a 16-m deep slurry wall constituting the outer structural wall of the building while protecting it from the pressure of groundwater. In September 2011, the work on the second stage of project began, the general contractor of which was the Polish-Spanish consortium of Budimex SA and Ferrovial Agroman SA.

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Badania laboratoryjne ekranów akustycznych

Dulak L.

Magazyn Autostrady

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2015

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Nr 5

90--96

PL

Niniejszy artykuł omawia zakres i formę przedstawienia wyników badań laboratoryjnych związanych z oceną parametrów akustycznych drogowych urządzeń przeciwhałasowych w postaci ekranów akustycznych. Parametry akustyczne zaraz obok parametrów geometrycznych są głównym czynnikiem decydującym o skuteczności ekranów akustycznych, rozumianej jako różnica poziomu hałasu w punkcie odbioru przed zainstalowaniem i po zainstalowaniu ekranu [10].

EN

The article discusses the scope and method for presentation of the results of laboratory tests related to the evaluation of the acoustic parameters of the road noise abatement devices in the form of noise barriers.

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Problemy związane z jakością akustyczną pomieszczeń typu „open space”

Jabłoński M., Kruczek A.

Fizyka Budowli w Teorii i Praktyce

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2015

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T. 7, nr 3

23--28

PL

W pracy przeanalizowano problemy związane z jakością akustyczną biur typu „open space” w obiektach użyteczności publicznej. Przedstawiono wartości głównego parametru związanego z jakością akustyczną jakim jest czas pogłosu. Następnie oceniono komfort w analizowanym biurze na podstawie takich wskaźników jak: zanik przestrzenny dźwięku wraz z podwojeniem odległości D2,S (Spatial Decay Rate of Speech), poziom dźwięku mowy w odległości 4m od źródła LP,A,S,4m (A-weighted Sound Pressure Level of Speech at a distance of 4m), promień dekoncentracji rD (Distraction Distance), promień komfortu akustycznego rC (Distance of Comfort) oraz promień prywatności rP (Privacy Distance).

EN

This paper analizys acoustics problems in open plan offices. The main room acoustics parameter, which is the reverberation time, was analyzed. Then, comfort of this office was rated based on such indicators as Speech Transmission Index STI, A-weighted Sound Pressure Level SPL(A), Spatial Decay Rate of Speech D2,S, A-weighted Sound Pressure Level of Speech at a distance of 4m Lp,A,S,4m, Distraction Distance rD, Distance of Comfort rC and Privacy Distance rp.

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Studies of densities, viscosities and ultrasonic speeds of binary mixtures containing isopropyl alcohol and ketones at different temperatures

Srinivas S. S. J., Tulasi Koteswari Bai B., Babu Rao K., Narendra K., Sarath Babu M.

International Letters of Chemistry, Physics and Astronomy

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2013

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Vol. 10, iss. 2

151-158

EN

The densities, viscosities and ultrasonic velocities of binary liquid mixtures of Isopropyl alcohol with acetophenone and methyl isobutyl ketone (MIBK) have been measured at temperatures 298.15 and 308.15 K over the entire range of mole fraction. From these data, acoustical parameters such as adiabatic compressibility (β), free volume (Vf) and free length (Lf) have been estimated using the standard relations. The results are interpreted in terms of molecular interactions present in the mixtures.

10

Analiza własności akustycznych pomieszczenia w zależności od kształtu sufitu

Jabłoński M.

Fizyka Budowli w Teorii i Praktyce

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2010

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T. 5, nr 3

13-16

PL

W pracy przedstawiono porównanie własności akustycznych pomieszczenia dla różnego rodzaju konstrukcji sufitu. Wykorzystano parametry związane ze stosunkiem energii (C80), przestrzenne (LF), określające zrozumiałość mowy (STI) oraz spadek energii w przestrzeni (DL2)

EN

This paper presents a comparison of acoustic properties of room for different types of ceiling construction. We used parameters related to energy ratio (C80), spatial (LF), indicating the speech intelligibility (STI) and a spatial decay (DL2).

11

An attempt to determine impact of a room shape on the reverberation time

Nowoświat A., Olechowska M.

Architecture Civil Engineering Environment

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2010

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Vol. 3, no. 4

73-80

EN

One on the most important parameters defining acoustics of the interior is time of reverberation which determines all other parameters defining e.g. quality of speech, articulation, clarity of music, basses ratio, warmth of sound, etc. The authors of the paper made an attempt to determine impact of a room shape, length to height ratio on the reverberation time. After first simulations and studies it seams that not only room acoustic absorption and capacity influences reverberation time but also a room shape.

PL

Jednym z najważniejszych parametrów określających akustykę wnętrza jest czas pogłosu, który to determinuje wszystkie inne parametry określające choćby: zrozumiałość mowy, wyrazistość, klarowność muzyki, stosunek basów, ciepło brzmienia itp. Autorzy niniejszego opracowania podjęli próbę określenia wpływu kształtu pomieszczenia, stosunku długości do wysokości na czas pogłosu. Po pierwszych symulacjach i badaniach wydaje się, że czas pogłosu zależy nie tylko od chłonności akustycznej pomieszczenia i jego wielkości, ale również kształtu pomieszczenia.