@article{ author = {HormoziMoghaddam, Z. and Mokhtari-Dizaji, M. and Movahedin, M. and Ravari, M.E.}, title = {Estimation of mechanical index distribution of low intensity ultrasound waves in cell studies}, abstract ={Considering the use of mechanical stimulation such as low-intensity ultrasound for proliferation and differentiation of stem cells, it is essential to understand the physical and acoustical mechanisms of acoustic waves in vitro .In this study, modeling of the mechanical index (MI) was applied to provide treatment protocol and to understand the effective physical processes on reproducibility of  stem cells. The acoustic pressure and mechanical index equations are modeled and solved to estimate optimal mechanical index for kHz and MHz frequencies for  continuous exposure mode, transducer and the culture environment area in cylindrical coordinates. Based on the results of the axial and radial pressure distributions, regions with 0.7 mechanical index (cavitation threshold), more and less than threshold of induced cavitation were identified for extracting of radiation arrangement to cell medium. In order to validate the results of the modeling, the acoustic pressure in the water and near field depth was measured  by a piston hydrophone. Results of modeling and experiments show that the model is consistent with the experimental results of those having correlation coefficients of 0.91 and 0.90 (p<0.05) for 1 MHz and 40 kHz transducer, respectively.  }, Keywords = {Treatment planning, Ultrasound waves, Mechanical index, Cell study.}, volume = {5}, Number = {1}, pages = {1-13}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-100-en.html}, eprint = {http://joasi.ir/article-1-100-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Deldar, H. and Majidi, M. and Rezaali, V.}, title = {Seabed sediments determination using laboratory examination of acoustic characteristics of sediments}, abstract ={Acoustic remote sensing techniques is a useful tool for seabed sediment classification in hydrography, that in this method, seabed sediments estimated using send and receive sound waves and analysis of the backscatter data. Backscatter data from sediment has several features that can be made by extracting them, sediment separating and classification.in this paper, is provided laboratory conditions to investigate the acoustic properties of sediments. Echo receive from sediment in 4 Frequency (55, 60, 65, 73 khz) is processed using acoustic devices and Insert 4 type of sediment in the aquarium bed. Feature were extracted, including statistical moment (energy, time-spread, skewness and kurtosis), spectral moment (standard deviation, the order of the moment, spectral skewness, spectral kurtosis and power spectral density) and the fractal dimension (Hausdorff (. In this experiment, energy parameter, standard deviation and average power (from power spectral density) well able to distinguish sediments. }, Keywords = {Acoustic remote sensing, Acoustic wave, Seabed sediments, Hydrography.}, volume = {5}, Number = {1}, pages = {14-24}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-108-en.html}, eprint = {http://joasi.ir/article-1-108-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Talebitooti, R. and ChoudariKhameneh, A.M.}, title = {Investigation of sound insulations effects on acoustic behavior of automotive cavity components using Energy Statistical Analysis method}, abstract ={In this paper, the acoustic behavior of automotive cavity components is Investigated. For this purpose, by the aid of numerical simulation, the effects of using porous layer insulation in different parts of the cavity are studied. The numerical simulation is based on  Statistical Energy Analysis; therefore, at the first stage the governing  equations for the Statistical Energy Analysis are presented. Then, all internal and external components of the car body are divided into small subsystems. Herewith, the internal and external cavities of the car body have been identified. In the following, considering that the method of Statistical Energy Analysis is based on energy storage and transmission, connections between all components of the model are created.  Then, with applying all the sound sources into the model, the effects of using porous materials on sound transmission loss in some of the main components of the car body, including the roof, floor and dashboard panels are investigated. The results show that using of sound insulations in different parts of the car, especially on the roof, improves the noise reduction to the cavity.}, Keywords = { Energy statistical analysis, Sound transmission, Porous layer, Sound insulation.}, volume = {5}, Number = {1}, pages = {25-34}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-118-en.html}, eprint = {http://joasi.ir/article-1-118-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Riyazi, GH.H. and Shafiei, N.}, title = {Effect of sound waves on cholinergic system and locomotor activity in rat}, abstract ={Today, sounds in the environment are a stressor and can damage different systems of the body. Neuronal messages are controlled and regulated by enzymes. Among these enzymes, acetylcholine esterase enzyme is more important in memory and learning. The aim of this study is to investigate the effect of mechanical waves on cholinergic system in rat behaviors in stressful environments. In this study, 10 adult male rats were used. The rats were exposed to 528 Hz and 100 dB 2 hr per day for 21 days. The activity of acetylcholinesterase enzyme was measured. The plus maze test was used to measure anxiety behavior. The results showed that the sound increases the activity of acetylcholinesterase enzyme, which causes memory impairment. The percentage of time in the open arm decreases, in addition, the percentage of enter into the open arm decreases, which indicate an increase in anxiety. Moreover, corticosterone level has increased. Results reveal that sound changes  memory and anxiety behaviors by distrupting the cholinesterase enzyme activity and neurotransmitter secretion.}, Keywords = {acetylcholinesterase enzyme, sound waves, corticosterone hormone, anxiety.}, volume = {5}, Number = {1}, pages = {35-41}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-114-en.html}, eprint = {http://joasi.ir/article-1-114-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Azizi, SH. and Riazi, GH.H. and Shokri, A.A.}, title = {The effect of sound waves on Fe2O3 nanoparticles permeability of cancer cells}, abstract ={The drugs that usually are applied as anticancer are toxins. These toxines are inorganic or organic molecules which harm normal cells as much as cancer cells. Resently, researchers are trying to find ways to develop targeted drugs (molecules) which kill cancer cells exclusively. Different methods have been developed for killing cancer cells .e.g. heating the toxic drugs by electromagnetic field or activate the drug locally by sound or heat waves. These methods are non- invasive. In this research, two physical techniques were used to kill cancer cells, 528 Hz sound waves and Fe2O3 nanoparticles magnetic field. Nanoparticles were synthesized and cells were cultured. The viability of cells was conducted by MMT test. It was evident that the nanoparticles interacting with the cells membrane and the magnetic field applied on the sample changed the membrane structure. Considering the possibility of frequency and intensity change sound wavw  is more applicables in short time.}, Keywords = {Sound ,528 HZ, Fe2o3 nanoparticles, Cancer cell, MTT method.}, volume = {5}, Number = {1}, pages = {42-48}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-113-en.html}, eprint = {http://joasi.ir/article-1-113-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {salehi, H. and Gholampor, A. and Shojainejad, F.}, title = {Simulation of a sound waveguide by two-dimensional phononic crystal with a hexagonal latice}, abstract ={In this Paper, at first a band structure of a two-dimensional phonon crystal with square lattice including polymetheyl methacrylate cylinders, in air matrix, waz considered. By accounting for the band gap range of this structure, a sound waveguide was simulated. The expected result was observed. Then, another structure with a hexagonal lattice, including aluminum cylinders in tungsten matrix material was studied. By utilizing a finite element, computational  method and COMSOL software and Matlab bandwidth structure was calculated. Also, the effect of symmetry on the width of the gap was investigated. By detecting the band gap, the simulation of an audio waveguide in the frequency range of 0.59 and 0.61 kHz was performed.}, Keywords = {Phononic crystal, Simulation, Sound waveguide, Band transmission, Band gap.}, volume = {5}, Number = {1}, pages = {49-55}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-92-en.html}, eprint = {http://joasi.ir/article-1-92-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Hoseini, S.M. and Housaindokht, M.R. and Izadyar, M. and Izadi-Najafabadi, R.}, title = {Effect of ultrasound on the chemical and thermal stability of alpha-lactalbumin}, abstract ={Ultrasound is sound whose frequency is too high for humans to hear which is in the frequency range of 20 Hz–20 kHz, and the frequency of ultrasound waves is above 20 kHz. The aim of this study was to observe the effect of ultrasound and sonication (20 kHz prob) on heat and chemical stability of α-lactalbumin. The interaction of anionic surfactant, SDS, and cationic surfactant, DTAB, with α-lactalbumin in the absence and presence of ultrasound has been investigated using UV and fluorescence spectroscopy. α-lactalbumin was denatured in a 2-state process. Using UV spectroscopy, the stability of α- lactalbumin ) ( was the least upon treatment with SDS in the absence of ultrasound (7.483 kJ.mol-1) and this amount increases after 20 minutes of sonication time (8.691 kJ.mol-1). Also, the stability of α- lactalbumin ) ( was the least upon treatment with DTAB in the absence of ultrasound (8.817 kJ.mol-1) and this amount increases after 20 minutes of sonication time (11.210 kJ.mol-1). Thermodynamic parameters ( Hm, Cp, Tm and G0(H20)) were determined for the thermal denaturation of bovine α-lactalbumin in the absence and presence of ultrasound using UV spectroscopy. Results shows that ultrasound increases the heat stability and Tm of α-lactalbumin and decreases the Hm and Cp,m.  }, Keywords = {α-lactalbumin, ultrasound, surfactant, fluorescence}, volume = {5}, Number = {1}, pages = {56-63}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-104-en.html}, eprint = {http://joasi.ir/article-1-104-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2017} } @article{ author = {Talebitooti, R. and Ganjkhanloo, M. and ChoudariKhameneh, A.M.}, title = {Study of the effects of geometrical parameters on noise reduction in a simple expansion chamber muffler with extended inlet and outlet tubes}, abstract ={In this paper, the effects of geometrical parameters in a simple expansion compartment with input and output tubes on its acoustic damping performance are studied by analytical and numerical method. In analytical model, the transfer matrix method (TMM), and in numerical model, the finite element method (FEM) are utilized to study the effective parameters. These effects include parameters such as extending the inlet and outlet tubes into the expansion chamber and increasing their lengths, changing the position of the input and output tubes, adding holes and varing their diameters and their numbers in the chamber. The results show that the performance of the audio damping improves by adding segmentation and increasing length. It can also be found that by adding holes. Into the pit and increasing their numbers, the frequency associated with the peak of acoustic damping is increased. Therefore, they can be used to improve the design of muffler in the desired frequency range.}, Keywords = {Muffler, sound transmission loss, Transfer matrix method, FEM.}, volume = {5}, Number = {2}, pages = {1-11}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-124-en.html}, eprint = {http://joasi.ir/article-1-124-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {Mahdavifar, M. and Nouri, A. and Astaraki, S.}, title = {Optimization of sound transmission loss in a finite-length FGM plate using multi-objective genetic algorithm}, abstract ={In this paper, the optimization of sound transmission through finite-length Functionally Graded Materials (FGM) plates by the use of genetic algorithm is studied. The main objective of this paper is to identify and optimize the effective parameters for sound power transmission of these structures. In this regard, at first, the dynamic equations of the plate are obtained using the classic theory of thin plates, then the wave propagation governing equations are extracted according to the Roussos theory. Next, the Transmission Loss coefficient (TL) of the structure is calculated by applying the boundary conditions. The effect of parameters effective on sound transmission loss is numerically investigated and optimization of sound transmission loss is executed by applying multi-objective optimization using Non-dominated Sorting in Genetic Algorithm (NSGA). The purpose of optimization is to maximize the sound transmission loss of FGM plate with minimization of its weight simultaneously, and the critical frequency of the plate is also considered as the problem constraint. The results show that the FGM material, plate thicknesses, layers layout, plate dimensions, power law exponent and the angle of incidence play an important role in reducing the sound power transmission through these structures.  }, Keywords = {Sound transmission loss, FGM plate, Power law exponent, Genetic algorithm, Optimization.}, volume = {5}, Number = {2}, pages = {12-21}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-116-en.html}, eprint = {http://joasi.ir/article-1-116-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {Sadeghi, H. and Ghasemi, A.}, title = {Analysis and determination of effective parameters on direction-finding performance in infrasound sensing arrays}, abstract ={Recently, infrasound arrays have been greatly considered by researchers because of their unique ability in long-range monitoring of natural and anthropogenic events. Since different geometric configuration have different performance in terms of detection probability and direction-finding accuracy, it has always been the question of what the optimal arrangement for an infrasound array is. In this paper, three methods for performance evaluation of infrasound microphone arrays are introduced and in each case, associated analytical equations are derived. Firstly, the so-called frequency-wavenumber power spectral density is described as a well-known array-based detection performance evaluation criterion. As the second method, direction-dependency of array-averaged coherence coefficient is proposed for measurement of detection accuracy. Finally, the degree of uncertainty in estimation of parameters of incoming wave over the array is proposed as a performance criterion. Then, by using the proposed methods, performance of different array geometries are studies through several computer simulations. The results of this paper show the required characteristics of an optimum configuration strategy for the deployment of infrasound arrays.  }, Keywords = {Array geometry, Microphone array, Optimum configuration, Infrasound.}, volume = {5}, Number = {2}, pages = {22-42}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-102-en.html}, eprint = {http://joasi.ir/article-1-102-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {Sabzyan, M. and MazloomiJorkuyeh, S. and TayebiRahni, M. and Massah, H.R.}, title = {Numerical modeling of normal modes of body of a setar}, abstract ={In this work, eigen modes and eigen frequencies of the body (sound board and sound box) of the setar, a persian stringed musical instrument, are studied. Eigen modes of the sound board and the whole body, neglecting the holes, are calculated independently and analyzed comparatively. This scheme of separate modal analyses for different parts of the setar will lead to the understanding of their individual roles in the overall output sound. In categorizing and assessment of sound quality of musical instruments, the study of characteristics of frequency response function (ERF) is important.  In case of stringed musical instruments like setar, of the defining parameters are the first peak of FRF and its location. This first peak usually coincides with first air eigen frequency which in the present research occurs at about 377 Hz. Thus, all the other eigen modes like 588 Hz and 740 Hz, construct the rest of the FRF. Also, the effects of such as sound board thickness, wood material properties shape of sound box and other structural features of setar on two value of eigon frequencies can assessed. Furthermore, analysis of the aero-acoustic pressure contours and the eigen modes of the setar structure (sound board and box) and air allows the nature (air, structure or coupled air-structure) of a acoustic mode to be determined.}, Keywords = {Setar, Eigen frequency, Aero-acoustic, Finite element method.}, volume = {5}, Number = {2}, pages = {43-53}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-105-en.html}, eprint = {http://joasi.ir/article-1-105-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {Khodami, S. and Havaej, P. and Sadeghi, H.}, title = {Investigation of the effects of ground surface and sound velocity profile on sound attenuation by employing parabolic equations method}, abstract ={The sound attenuation in atmospheric propagation depends on several factors, such as ground material, temperature, and geographical features. In this study, the propagation of sound in the atmosphere above ground has been studied. For the simulation of the ground surface, the four-parametric model of Attenborough has been employed to compute the specific impedance of the ground surface. At first, the governing equations of sound propagation and Parabolic Equations (PE) method were presented; then, by employing Finite Difference Method (FDM) discretization and Crank-Nicolson approximation, algebraic equations were obtained. The algebraic equations were solved by Three Diagonal Matrix Algorithm (TDMA) in order to evaluate the sound pressure and sound attenuation over the computational domain. After validation of the numerical simulation, the results of the linear and logarithmic sound velocity profiles were presented and compared in frequency range of 10-100 Hz. For the asid sound velocity profiles, two cases were considered; first, where shadow zone could not exist and the another, where the shadow zone was possible. The sound attenuation over 100 dB was achieved in range of frequency of 40-100 Hz in second studied case. In this situation, with increasing frequency, attenuation was increased but more oscillation was observed in the attenuation. Also, for the flat surface ground, sound attenuation was examined for different sound velocity profiles. Finally, the effects of ground surface roughness on the sound attenuation, by considering the logarithmic sound velocity profile, were investigated at different frequencies.  }, Keywords = {Sound propagation, Ground surface simulation, Parabolic Equation (PE) method, Sound attenuation, Finite Difference Method (FDM).}, volume = {5}, Number = {2}, pages = {54-66}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-127-en.html}, eprint = {http://joasi.ir/article-1-127-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {Taghi, A.R. and MokhtariDizaji, M. and Ahmadi, Z.A. and Heydarheydari, S.}, title = {String phantom in calibration of Doppler ultrasound systems}, abstract ={Doppler ultrasound system is of great importance among the diagnostic modalities. To ensure the output of such systems that measure the physiological quantities, performance tests were carried out using AIUM and BSI protocols on 20 pulsed wave Doppler systems in 9 reference centers in Tehran. In these tests, velocity of Doppler ultrasound systems as an acoustic parameter was assessed. To evaluate the performance of pulsed wave Doppler, an in-house string phantom was designed for the first time in the country. This phantom was used to investigate pulsed Doppler ultrasound systems. The results show that the minimum and maximum errors in blood flow velocity measurement on 20 Doppler systems were 23 (cm/s) and 83 (cm/s), respectively. The mean±SD for velocity measurement errors in 6 Doppler systems (7.5 MHz) and 12 systems (3.5 MHz) were 11±16 and 28±9 (cm/s), respectively, the velocities ranged 10-140 (cm/s). These errors emphasize the necessity for doing performance tests in Doppler ultrasonic systems.  }, Keywords = {Doppler ultrasound systems, Performance tests, String phantom.}, volume = {5}, Number = {2}, pages = {67-76}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-121-en.html}, eprint = {http://joasi.ir/article-1-121-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} } @article{ author = {GhasemiYeklangi, A. and EsmaelzadehKhadem, S. and Darbari, S.}, title = {Investigating the parameters affecting the graphene thermoacoustic speaker}, abstract ={Thermoacoustic speakers are a new generation of speakers that have come to the attention of the scientific community in recent years. These speakers have various applications in the industry due to the lack of use of vibrating parts in sound production and the need for a magnet. Due to the newness of the topic, the need to conduct theoretical studies in this field is felt severely. In response to this need, in this paper, a theoretical approach for investigating the effect of different variables on the performance of a heat sink speaker (thermoacoustic) has been used. The results are very useful for choosing the optimal structure of the acoustic speakers, and determine the amount of different quantities such as thickness, dimensions, electrical input power, substrate type, activity atmosphere and the shape of the sound pressure field for the heat-producing material in the heat sink speaker. Another result of this theoretical approach is to obtain a spectral acoustic pressure range at various frequencies from 1 Hz to 1 megahertz for the speaker at various distances.  }, Keywords = {Thermoacoustic loudspeaker, Graphene, Thermoacoustics.}, volume = {5}, Number = {2}, pages = {77-83}, publisher = {Acoustical Society of Iran}, url = {http://joasi.ir/article-1-129-en.html}, eprint = {http://joasi.ir/article-1-129-en.pdf}, journal = {Journal of Acoustical Society of Iran}, issn = {2345-5748}, eissn = {2345-5748}, year = {2018} }