bluuebunny/crossref_metadata_2025 huggingface dataset:
A Statistical Analysis of Robust Cicada Noise Level
Authors: Misono Leo , Muto Kenji
Published: December 2023

When cicadas are chirping loudly during the traffic noise measurements in summer, it is difficult to obtain the correct traffic noise level. In the previous study, there were few reports on cicada noise levels, and the reports showed that the levels were uncertain, for example, as the
cicada noise reached around 56 dB in the forest. Our aim was to investigate the details of the noise levels of robust cicadas. We measured the sound pressure level of the cicada noise in a free field. In addition, they were measured some features; the noise waveform, body length, total length
and weight. The waveform was estimated to the equivalent continuous sound pressure level (LAeq) at 1 m per a cicada, where the level was extracted while the cicada sounds violently. The measurement data included of the levels of 77 cicada noises for statistical analysis. The type of LAeq distribution
was normally distributed, and the mean value was 73.1 dB (standard deviation = 3.5 dB). The cicada measurements were normally distributed for body length, total length, and weight. However, there were no correlations between the LAeq and body length in the scatter plot results.
CFD Prediction of Ship Propeller-induced Underwater Radiated Noise
Authors: Shin Keun Woo , Tomy Joseph Praful , Berger Stephan , Lundgren Ege , Nielsen Jens Ring
Published: December 2023

As the negative impact of man-made underwater radiated noise (URN) on marine life is recognized by the scientific community, guidelines and initiatives are proposed by port authorities and international organizations for monitoring and reducing URN from ship operations. In medium to
large-size ships, propellers are often the dominating URN source as compared to on board machinery and flow turbulence. Within this paper, URN from cavitating flow around a ship propeller in behind-hull condition is predicted by a high-fidelity CFD solver, coupled with an acoustic analogy
method. The noise sources are hydrodynamic flow fields around propeller and rudder models, simulated by CFD with a multi-phase flow model. Far-field acoustic noise is calculated by the permeable Ffowcs-Williams Hawkings (FWH) acoustic analogy method. Unsteady cavitation patterns and URN levels
from the numerical predictions are validated against experimental results from a cavitation tunnel test. The propeller blade shape is optimized for minimum cavity volume by parametric design variations and performance evaluations based on steady CFD simulations with a simplified hull wake
model. The URN predictions from unsteady CFD-FWH simulations demonstrate that the cavity volume reduction for the optimized blade design can lead to considerable decrease of low-frequency tonal noise.
Noise and vibration test analysis of working and resting spaces in subway equipment areas
Authors: Li Yu , Liu Peijie
Published: December 2023

Field measurements of noise and vibration were conducted in the working and resting space of the equipment area of the Guangzhou Railway Station subway station, using equivalent continuous A-weighted sound level (LAeq), maximum Z vibration level (VLzmax), and frequency division maximum
vibration level (VLmax) for evaluation. The results of the study showed that: The worst noise environment in the car control room and the quietest in the locker room; Comparing the different normative limit requirements, the equivalent continuous A-weighted sound level of each measurement
point meets the standard differently; Noise decreases with increasing frequency and noise is dominated by 100~200Hz; Under the influence of the train on the indoor vibration of the building, the values of frequency division maximum vibration level of each measurement point are greater than
the values of maximum Z vibration level; Train passing time ground measurement point vertical vibration energy is mainly distributed in 50~250Hz, vibration acceleration level peak in 80~100Hz between. This study has some reference value for the evaluation of noise and vibration in the working
and resting space of the equipment area of the subway station and is important for the improvement of the sound environment of the subway staff in the future.
Examination of Sound Environment Design Method for the Behavior of Office Workers
Authors: Kitagawa Toya , Sakai Takeshi , Tsujimura Sohei
Published: December 2023

In recent years, offices have changed due to work style reforms and the impact of the corona crisis. In contrast to the conventional belief that a quiet office is desirable, studies are underway to create an office environment in which office workers can perform comfortably and efficiently
by adding pleasant sounds. We have implemented a nature sound environment control system that provides relaxation and concentration through embracing biophilic design, high-quality sound reproduction and direction control to realize a comfortable space that suits people. While introducing
this system in multiple office spaces and proceeding with demonstration experiments, it has become clear that the type of sound source and listening level that make people feel comfortable differ depending on the office work situation. Therefore, in order to quantify the effects on humans
such as relaxation and concentration, we used psychological methods (adjustment method and rating scale method) to verify the type of sound and listening level suitable for the office situations, such as working or taking a break. In our paper, we examined the effect of the sound environment
on workers' psychological impressions in paperwork and breaks, which are the main worker actions in the office.
6-degree-of-freedom Motor mounting characteristic for high frequency Solid-borne of Battery Electric Vehicles
Authors: Oba Keisuke , Kanaiwa Shingo , Miyakawa Takayuki , Enomoto Toshio , Pasma Eric , Klerk Dennis de
Published: December 2023

Battery Electric Vehicles (BEVs) are required high level of noise / vibration performance. In the case of Internal Combustion Engine Vehicles (ICEVs), solid-borne noise has been considered mainly up to 1 kHz. For BEVs, the frequency range of solid-borne noise is higher because of the
electric powertrain and other mechatronic on board. The motor mounting has internal resonances in the high frequency range that can cause noise issue in prototype vehicles, leading to vehicle development rework. In this paper, we introduce the need to deal with 6 degrees of freedom (DOF) characteristics
in NV development for BEVs and propose a new measurement method that makes it possible to measure 6-DOF characteristics. Using this approach, this makes it possible to design the high frequency noise at the planning phase before vehicle prototyping, which is expected to improve development
efficiency.
Psychological responses to amplitude-modulated low-frequency sound
Authors: Matsuda Hiroshi , Machida Nobuo
Published: December 2023

Amplitude-modulated low-frequency sound is a sound in which a pure tone with a carrier frequency lower than 100 Hz is a carrier wave, and the sound pressure level continuously fluctuates over time. This study measured psychological responses to amplitude-modulated low-frequency sounds
using psychological questionnaires. We measured three sensations peculiar to low-frequency sounds, annoyance, vibratory sensation, and oppressive sensation caused by amplitude-modulated low-frequency sounds using a seven-grade rating scale. In addition, we measured the loudness and fluctuating
sensation caused by amplitude-modulated low-frequency sounds using a magnitude estimation method. This paper discusses the relationship between the psychological response quantities and the physical quantity that constitutes the amplitude-modulated low-frequency sound, the dose-response relationship
when exposed to amplitude-modulated low-frequency sound above the sensation threshold.
Experimental study on effects of sound on vibratory sensation of horizontal vibration
Authors: Matsuda Hiroshi , Machida Nobuo
Published: December 2023

Humans are exposed to both vibration and noise when riding in vehicles such as cars and trains. Therefore, an evaluation of the vibratory sensation based on the combined effect of vibration and noise is needed. This study aims to determine the effects of sound on whole-body vibratory
sensations of horizontal vibration. In this study, we conducted two experiments to research the influence of sound on vibratory sensation using an electrodynamic vibration test machine. The first experiment measured the point of subjective equality of the magnitudes of vibration and sound,
and the second experiment measured the psychological effects of sound on vibratory sensations using the magnitude estimation method and the seven-grade rating scale method. This paper describes the results of investigating vibration dominance in a combined environment of vibration and sound
and the effects of sound on the subjective magnitude of vibration and vibration discomfort.
Prediction and Analysis of Noise Impact and Noise Reduction Scheme Effect for Complex Road Types
Authors: Yang Jie , Liu Qiang , Kang Zhongxu , He Lei
Published: December 2023

In order to improve urban traffic efficiency, complex road types are increasingly common in cities. At the same time, it also increases the impact of noise. As an important noise reduction measure, noise barrier measures are widely used in traffic noise control. The prediction of noise
reduction scheme in advance is conducive to the scientific and reasonable setting of noise barrier measures. In this paper, based on the impact of traffic noise from elevated roads on a residential building, the noise prediction software is used to simulate the scene, and the model is calibrated
with the field measured data, and the noise contribution of elevated road and ground road to sensitive targets is quantitatively analyzed. On this basis, the noise reduction effects of different types of noise barrier measures, such as vertical, bending, semi-closed and fully-closed, on sensitive
targets are analyzed. The effect of different additional length on noise reduction is further analyzed. The simulation analysis also focuses on the key buildings and floors that are seriously affected by road noise, providing sufficient technical support for the implementation of the subsequent
overall noise reduction project.
Assessment and mitigation of the rotor noise for future urban air mobility vehicles
Authors: Wu Han , Chen Wangqiao , Zhou Peng , Zhang Xin , Huang Xun , Wang Puyuan , Zhou Guocheng , Chen Bao
Published: December 2023

Multi-rotor configurations are often adopted in urban air mobility (UAM) designs. The aerodynamic noise of rotors is a significant source of the UAM vehicles, requiring systematic measurements and mitigation. To this end, a large-scale test rig is designed and built to enable the acoustic
measurement of UAM rotor blades. The test rig is placed in an anechoic chamber with the size of 8.1 m (L) × 6 m (W) × 5.1 m (H). The aerodynamic force and noise of a pair of custom-designed blades with a radius of 0.5 m are measured. The rotational speed ranges from 600 to 1800
revolutions per minute. A zig-zag turbulator is applied on the blade surface to trip the boundary layer. The effect of the turbulator on rotor noise is negligible compared to the untreated case, indicating that the blade boundary layer is fully developed. Particulate roughness is then implemented
on the blade surface to explore the potential of noise reduction for turbulent blade boundary layers. Results show that a reduction of 3 dB in high-frequency broadband noise can be achieved upstream and downstream of the rotor at 1800 RPM when the particulate roughness is applied on the leading-edge
region of the blades.
A cross-cultural study on perception of residential noises using the online questionnaire
Authors: He Jiwei , Akita Takeshi , Sano Naoko , Yu Hanui , Hirate Kotaroh
Published: December 2023

With the spread of the coronavirus, people are spending less time outside and more time working and studying online. As a result, the soundscape of the residential environment is becoming more important. In this study, we will identify the tendencies of people in Japan and China to
evaluate the sound of their living environment. Based on the data collected from the questionnaire, portfolios will be created. The portfolios will allow us to compare differences in evaluation tendencies across multiple cultures. The survey for both China and Japan was carried out by online
questionnaire. The questionees were 81 Japanese and 32 Chinese. As a result, the impact sound, such as the sound of opening and closing windows and doors, interior decoration, and moving furniture, is rated worse by Chinese people than by Japanese people. This may be due to differences in
the choice of interior materials and the structure and type of housing. According to the data, 87.5 % of people in China live in houses made of reinforced concrete, while Japanese houses are mostly made of wood (58.9 %). At the same time, the material used for flooring in China is mostly tile,
while in Japan it is mostly wood.
Sound transmission through reconstructed middle ear using a full-scale model experiment
Authors: Ichino Takuma , Sakurai Tomoki , Ito Ryuya , Kurashina Yuta , Hirabayashi Motoki , Kurihara Sho , Asakura Takumi
Published: December 2023

Tympanoplasty is surgical operation performed for intractable otitis media which is chronic otitis media and chronic suppurative otitis media with cholesteatoma and has multiple types depending on the patient's medical condition. This includes ossicle reconstruction by inserting reconstruction
material to restore hearing, but there are some cases in which postoperative hearing performance is poor, and no expected knowledge has been obtained. There are some studies about the mechanism of sound transmission through human intact middle ear, but we have not yet obtained enough information
on the mechanism of sound transmission through the reconstructed ossicles. In this study, the hypothesis that differences in sound transmission occur due to differences in the type of the reconstructed model was verified by measuring the displacement of stapes footplate with laser doppler
vibrometer in a full-scale model experiment modeled on external auditory canal, tympanic membrane, and ossicles.
Multidimensional psychoacoustic grading method for road traffic noise
Authors: Ma Kuen Wai , Mak Cheuk Ming , Chung Fu Lai Korris , Wong Hai Ming
Published: December 2023

Road traffic noise is well accepted to be one of the significant sources of environmental noise. The traditional norms of noise evaluation are mainly focused on the noise level and the loudness sensation of occupants. However, researchers found that human perceptions of sounds are multidimensional
psychological processes in the perceptual dimensions about the human general judgment (Evaluation, E), sensitivity to the magnitude (Potency, P), and sensation of the temporal and spectral compositions (Activity, A) of noise. After that, a valid, reliable, and applicable psychometric tool
called Psychoacoustics Perception Scale (PPS) is designed to assess the multidimensional perceptual responses of occupants in the environment. This study aimed to investigate the performance of the psychoacoustic metrics and the PPS in evaluating the objective characterizes and the subjective
perceptual influence of road traffic noise on occupants, respectively. The results of the study showed that the gradings of the noise obtained from the PPS were associated with changes of the objective characterizes of the road traffic noise. These findings provided knowledge on the development
of multidimensional psychoacoustic grading method for road traffic noise in future.
Acoustic determination of the chatter and the cutting tool Planarity fault of an on-site milling
Authors: Langrand Christopher , Albert Antoine , Masset Maxime
Published: December 2023

On-site machining is a specific area where harmful vibrations can be generated by the dynamic interaction between the tool and the workpiece. These vibrations often cause the degradation of the workpiece and the cutting tool. It is therefore necessary to suppress and control this phenomenon.
In this paper, we present the acoustic characterisation of a common fault in on-site machining that causes these harmful vibrations: the tilting fault of the cutting tool. Our preliminary results show that the presence of microphones allows us to have little spatial control of the cutting
tool. There is an increase of around 5 to 8 dBA for a 0 and 0.5 mm tilt of the milling head along the X axis. An increase of around 10 to 12 dBA is recorded for a tilt of 0.10 and 0.20 mm of the milling head along the X axis. In contrast to the X-axis, tilting the milling cutter along the
Y-axis only results in a 5 dB increase in noise level for the filtered signals.
Development of soundscape evaluation method: an application of Psychoacoustics Perception Scale (PPS)
Authors: Ma Kuen Wai , Mak Cheuk Ming , Wong Hai Ming
Published: December 2023

There is a growing awareness of the standard development for soundscape evaluation. Although soundscape evaluation of environmental noise is not a new concept, the heterogenous between the soundscape studies will increase the difficulty in integrating the findings of the studies. Recently,
the findings of the fundamental human perceptual dimensions of sounds and the design of the Psychoacoustics Perception Scale (PPS) provided an insightful solution to the development of soundscape evaluation. The perceptual model, called EPA model, was designed to quantitively assess the context
content of acoustic environments regarding the human general judgment (Evaluation, E), sensitivity to the magnitude (Potency, P), and sensation of the temporal and spectral compositions (Activity, A) of sounds by using the PPS. In this study, the PPS was applied to the soundscape evaluation
of various public urban spaces. The construct validity of the EPA model by the PPS was verified. The application of the PPS in soundscape evaluation will be a novel and practical way in the standard development of soundscape evaluation.
The Sound Characteristic of Armored Electric and Internal Combustion Engine SUV
Authors: Rakhim Yogi Fitriadi , Sarwono R. Sugeng Joko , Sudarsono Anugrah Sabdono , Nitidara Ni Putu Amanda , Zakri Keysha Wellviestu
Published: December 2023

This study aims to classify and characterize the sounds produced by an armored SUV with an internal combustion engine and an electric motor in various driving situations. Based on our study, we found that electric vehicles (EVs) produce lower sound pressure levels (SPLs) than internal
combustion engine vehicles (ICEVs) under static conditions. The SPL levels indicates a significant difference of 4.64 dB(A) on average and 6.04 dB(A) on peak of the SPL levels of EVs and ICEVs. Our study also identified differences in the sounds produced by EVs and ICEVs under various scenarios.
The powertrain components of EVs and ICEVs have different characteristics and produce different sounds. Specifically, during acceleration, EVs had significantly less powertrain noise compared to ICEVs due to the absence of an ICE. In contrast, during deceleration, the EVs had more road bump
noise in the frequency range of 100-20000 Hz compared to ICEVs, possibly due to the ICE powertrain noises being more dominant compared to the suspension systems. In general, two distinct vehicles can be distinguished by their distinct sounds in various settings In addition, the electric vehicle
emits a number of sounds that are often absent from internal combustion engine vehicles.
Comparison of different noise sources for the simulative cabin noise assessment of an electrically propelled regional aircraft
Authors: Hüpel Yannik , Blech Christopher , Franco Andrea , Delfs Jan Werner , Kirsch Bastian , Langer Sabine C.
Published: December 2023

The rising number of passengers transported by aircraft leads to more flight traffic, further increasing the environmental impact of the aviation sector. In order to combat the growing environmental impact, the Cluster of Excellence Sustainable and Energy Efficient Aviation of TU Braunschweig
aims to advance research towards a climate neutral aviation industry, especially with the design of an electrically propelled short-range regional aircraft, among others. In the conscience of passengers, the focus is also shifted towards a healthy and comfortable travel experience. One of
the main factors influencing these aspects is noise inside the aircraft cabin. A lower noise impact can help increase the technology acceptance and further push towards more sustainable airborne transport solutions. This contribution aims to simulatively assess and compare the sound pressure
levels inside the passenger cabin of an electric propeller aircraft. The focus is laid on two of the most important noise sources: the tonal propeller excitation as well as the sound field beneath the turbulent boundary layer. The paper presents a wave-resolving FE model considering both sources
and shows, which sound pressure levels can be expected, while also comparing the frequency spectra separately, therefore enabling early design changes to help reduce the cabin noise.
Study of Simple Prediction Method for Road Traffic Vibration from viaducts
Authors: Kamiakito Noboru , Shimura Masayuki , Sano Yasuyuki , Mori Tatsuaki
Published: December 2023

On Prediction of Road Traffic Vibration of INCE/J Technical Subcommittees, we are studying the creation of prediction formulas for vibration from embankments and cuts and vibration from bridges. This paper presents the concept of a simplified method for predicting road traffic vibration
from viaducts. When large vehicle runs on viaduct, vibration occurs in the floor slab and propagates from the piers and foundation to the ground. Here, the reference waveform at the bottom of the pier is used as the reference point unit pattern, and the vibration propagates from the bottom
of each pier on the plane to the ground surface, and a method of calculating the combined value at the prediction point is considered, and the establishment of a prediction method is examined. bottom. In addition, we will report on the results of an attempt to predict the vibration propagation
situation to the surroundings for a large vehicle test run and compare it with the actual measurement value. In addition, we examined the calculation procedure assuming traffic flow conditions in this model.
Study on the effects of sound factors and their association with the psychological evaluation of thermal comforts
Authors: Ikami Satomi , Yoshida Shinji , Heo Jaeyoung
Published: December 2023

Humans have evaluated the living environment as a whole rather than based on individual factors. However, there are numerous ambiguities regarding the interrelationship between sound and thermal environment in actual living. In this research, we aimed to demonstrate the impact of sound
and its association with a psychological evaluation of thermal comfort by exposing participants to sounds. We performed subjective evaluation experiments using the semantic differential method. A subjective investigation of the surrounding and sound environment using 30 pairs of evaluation
items was conducted using the sound source of the fireplace. Additionally, we asked about the sound association and the clothing amount through free writing. In terms of evaluating the immediate surroundings, we compared the group that associated the sound with the fireplace appropriately
with the group that did not: "Warm," "Comfortable," "Open," and three other components, and the subjective evaluation of the sound shifted significantly to the positive side in three items. As a result, it was revealed that sounds positively affected thermal comfort
when associated appropriately. Furthermore, we clarified that associating sounds appropriately impacted the feeling of relaxation in the space.
The reduction of the reverberation using the sound-absorbing metamaterial in the conference rooms
Authors: Taira Yudai , Gomi Masaki , Goto Ryusuke , Nagatani Yoshiki , Tsuji Mitsutaka , Miura Kazuki
Published: December 2023

Sound-absorbing metamaterial, iwasemi consists of multiple perforated Fabry-Perot resonators which have different resonant frequencies reciprocally to achieve broadband sound absorption coefficient. We have installed acoustic panels that are optimized for the main band of human voices,
1/3 octave band center frequencies from 500 Hz to 1000 Hz, in some conference rooms and measured the reverberation time of the rooms before and after installation. The measurement result shows that the acoustic panels have decreased the reverberation time of the rooms dynamically in the target
frequency band (e.g. a case of we measured, the reverberation time reduced from 1.11 seconds to 0.66 seconds at 500 Hz octave band center frequency). As shown above, it has been indicated that installing plastic acoustic panels using acoustic metamaterial improves the acoustic environment
in the rooms.
Rain impact noise on aluminium cladding and the mitigation by damping materials
Authors: Leung Hing Shun
Published: December 2023

Raindrops on aluminium panels generate rain impact noise. Such percussive sound may reach 70 dBA in the nearby vicinity, causing disturbances to human activities and creating a nuisance. In Hong Kong, the use of curtain walls and aluminium wall cladding as the main building envelope
has become a trend. The annual rainfall of 2.4 meters (94 inches) in Hong Kong amplifies this issue. Rain impact noise is increasingly affecting people and has become a growing concern. Effectively mitigating rain impact noise has become important in modern building design. This study focuses
on the effect of different damping materials on rain impact noise when tested according to ISO-140-18:2006. It also includes an in-depth analysis of the correlation between vibration levels and sound levels generated under different testing configurations. The results showed that, with suitable
treatment to the aluminium panel, the generated noise can be reduced by 15 dBA.
Planning Infrastructure Projects by means of Psychoacoustic Quantities in the Joint Project "EAV-Infra"
Authors: Egeler Jonas , Huth Christine , Schlesinger Anton , Ende Christoph , Koch Thomas , Bartnitzek Jens , Höhle Laura , Böhme Ralf , Schlüter Benjamin
Published: December 2023

Within the joint project "Real-time Calculation, Auralization and Visualization of Sound Propagation and Noise Protection Measures for Infrastructure Projects" (EAV-Infra), funded by the Federal Ministry for Economic Affairs, the potentials of digital infrastructure planning
based on Building Information Modelling (BIM) and the auralization of different states of planning will be combined. In this contribution, the objectives of the project will be presented with particular focus on the intended application of psychoacoustics. Currently, planning noise protection
measures encompasses an elaborate comparison of various planning alternatives in a time-consuming process. Sound pressure levels, which are only informative to experts, are used to communicate states of planning to the public. Auralized signals of noise immissions and a description of the
effectiveness of noise protection measures by hearing-oriented quantities could constitute a more intuitive and intelligible evaluation basis for project managers and residents alike. In EAV-Infra, noise exposure will be evaluated based on psychoacoustic quantities. Both classical quantities
and newly developed indices, will be considered. In order to find a suitable psychoacoustic annoyance model for the railway context, listening experiments will be conducted, in which subjects evaluate various noise situations. Typical inner- and outer-city scenarios and various noise protection
measures will be assessed.
Optimizing the shapes of concert halls through parametric design
Authors: Yu Yen-Chieh , Tsay Yaw-Shyan
Published: December 2023

Building acoustic simulation tools have often been used to ensure a room's acoustic performance, but they are rarely used in the early design stage. In this study, an acoustic simulation plug-in of Grasshopper for Rhino, Pachyderm, was combined with parametric design and a multi-objective
optimization process to study the acoustic performance of a shoe-box-shaped concert hall in the early design stage. Three different factors of the sound field, sound pressure level A-weighting (SPL(A)), reverberation time (RT), and clarity 80 (C80), were discussed. One of the most famous shoe-box-shaped
concert halls, Großer Musikvereinssaal, was selected as the comparison model. Two thousand results were generated through a multi-objective process in 36 hours. Compared with Großer Musikvereinssaal, the Pareto front of the 2000 results showed better performance in various factors
of the sound field according to what it optimized.
Masking effect of water sound on road and rail traffic noises in office soundscape
Authors: Yu Boya , Chai Yuying
Published: December 2023

This study represents a laboratory experiment focusing on the effect of water sound on masking traffic noises in an office soundscape. Subjective evaluations and physiological responses of thirty-two participants exposed to the combination of water sound and traffic noises were measured.
Silence and pure traffic noises were used as the reference conditions. Significant masking effects of water sound were observed on both the subjective evaluation of the sound environment and the physiological responses to traffic noises. To improve the subjective evaluation of the sound environment,
the water sound was found to have stronger masking effect on rail traffic noises than the road traffic noise. To reduce the noise annoyance, SNRs at -3dB and 3dB was found to be the most effective for the conventional train noise and the high-speed train noise, respectively. Water sound at
low sound level (SNR=-3dB) was also found to be effective in improving the acoustic comfort for the conventional train noise. Effect of water sound in masking the physiological impact of traffic sounds was found to be limited which depended on the traffic noise type and participants characteristics.
Comparing to EDA, HR were found to be more easily affected by the water sound.
Sound field recording using distributed spherical microphone arrays based on a virtual spherical model
Authors: Sakamoto Shuichi , Katada Kosuke
Published: December 2023

Binaural synthesis helps provide rich spatial information to users. Spherical microphone arrays and head-related transfer functions significantly aid in realizing the aforementioned approach. In a typical case, a spherical microphone array is set at the recording point, and listeners
experience the sound binaurally as if they are at the recording point. However, in real situations, setting a microphone array at the recording point is not always feasible. In this study, we investigate binaural synthesis using an Auditory Display based on VIrtual SpherE (ADVISE) model with
distributed spherical microphone arrays. In the proposed ADVISE-based method, the virtual sphere is set around the target point, and the sound pressure on the boundary of the virtual sphere is calculated based on recorded signals using spherical microphone arrays. The simulation results indicate
that the proposed method can robustly synthesize sound fields even when the target point is far from the spherical microphone arrays.
Machine learning assisted design of acoustic metamaterials with broadband sound-absorbing and superior mechanical performance
Authors: Xiao Zhenqian , Gao Penglin , Wang Dongwei , He Xiao , Qu Yegao , Wu Linzhi
Published: December 2023

It remains challenging to design lightweight metamaterials with superior sound-absorbing and load-bearing capacities. One promising approach is using multiple coherently coupled resonators to serve as sound absorbers and reinforced grid cores of sandwich panels. However, with too many
design parameters each requiring careful tuning to reach the stringent critical coupling condition, achieving an optimal design based on experience alone is challenging. An autoencoder-like neural network is constructed that, once well trained, significantly promote the inverse design process
thanks to the highly efficient computational speed. Particularly, a probabilistic model is inserted into the network to tackle ill-posed inverse problems requiring man-made and probably unreal spectrum as an input, and can provide multiple ultra-thin (32 mm) and broadband designs. We have
fabricated and tested the optimized metallic sandwich structures, showing broadband capacity of using solely nine resonators to achieve quasi-perfect sound absorption (over 0.9) from 399 to 675 Hz. The static compression and dynamic impact testing also verify the superior mechanical performance
with high yield strength (21.2 MPa) and large normalized energy absorption (0.29) at lower relative density (13.5%). We believe this work is encouraging to accelerate the design of multifunctional absorbers targeted especially for low-frequency noise control in engineering.
Nonlinear numerical simulation of insertion loss for structures having a compressed softened porous layer sandwiched by double walls under acoustic excitation
Authors: Yamaguchi Takao , Ozaki Tetsuya , Yamashita Tsuyoshi , Kamio Chihiro
Published: December 2023

We perform nonlinear numerical simulation of insertion loss for structures having compressed porous layers sandwiched by double walls under acoustic excitation. The double walls are consisted of a steel base plate and a plastic cover plate. We compare the insertion loss including Urethane
foam with felt. These porous layers are compressed by a heavy frame around the cover plate. As increasing weight of the frame, Urethane foam has soft-hardening characteristics in its restoring force. If we set appropriate weight of the frame to get 33% compression, lower rigidity is obtained
for Urethane foam. This leads to softer porous layer for the double walls. And vibration and sound decrease from the base plate to the cover plate. For felt, the hardening characteristics appear. This leads to the higher rigidity and the more transmission. In the numerical calculation using
LS-Dyna as a nonlinear FEM code, geometric nonlinearity is considered. For compressed porous materials, Storaker model is adopted in consideration of material nonlinearity with hysteresis. Further, under compression, we also investigate the reason of the softening mechanism for the Urethane
foam using another model of microscopic structures. We reveal that the softening mechanism is due to geometric nonlinearity by using multiple Kelvin cells.
A eficácia do laser de Co2 no tratamento da Síndrome Geniturinária na menopausa – uma revisão bibliográfica
Authors: De Paula Luiz Guilherme Silva , Fernandes Vêda de Sousa Moraes , De Oliveira Junior Manoel Carneiro
Published: December 2023

A síndrome geniturinária na menopausa é um problema comum em mulheres na pós-menopausa, caracterizada por secura vaginal, coceira e dor durante a relação sexual. O tratamento pode envolver terapia hormonal, mas outros tratamentos, como o uso de laser de CO2 (dióxido de carbono), também podem ser usados. Estudos compararam o laser de CO2 com a terapia hormonal na melhora dos sintomas da síndrome geniturinária na menopausa em 114 mulheres (Sokol, 2017). Estudos demonstraram que tanto os lasers de CO2 quanto a terapia hormonal são eficazes no tratamento dos sintomas, mas os lasers de CO2 têm sido mais bem-sucedidos na redução da dor sexual. Em conclusão, o estudo demonstra que o laser de CO2 é uma opção eficaz para o tratamento das síndromes geniturinárias na menopausa em mulheres. No entanto, mais pesquisas são necessárias para avaliar a eficácia a longo prazo e compará-la com outras opções de tratamento.
Tumor de células granulares: relato de caso
Authors: Batista Narlla Thaiany da Silva , Reis Cind Lauren Araujo , Ferraz Fernanda Pereira , Monteiro Glenda Wéllida Alves , Aguiar Juliana Sousa , Da Costa Thiego Lopes , Carvalho Roberta Furtado , Marinho Luide Michael Rodrigues França
Published: December 2023

O tumor de células granulares é uma lesão rara, benigna, de origem neural que afeta principalmente a cavidade oral. Embora sua incidência seja baixa, este tumor é importante de ser investigado devido à sua localização, potencial agressividade local e risco de malignização. O objetivo deste trabalho é relatar um caso clínico de uma paciente acometida por uma lesão em bordo de língua, que procurou atendimento odontológico devido a um "caroço na língua", sendo diagnosticada com um tumor de células granulares. A paciente foi submetida a remoção cirúrgica da lesão, evoluindo satisfatoriamente, sem recidivas até o momento. Ilustrado pelo caso clínico, destaca-se a importância do cirurgião-dentista na identificação e tratamento de condições bucais raras, como o tumor de células granulares.
Metodologias ativas em habilidades médicas e anatomia humana: a importância do papel do monitor
Authors: Lopes-Cançado Gustavo Henrique , De Carvalho Bruno Fuerst Gonçalves
Published: December 2023

Este artigo refere ao uso de metodologias ativas no curso de medicina por meio da monitoria da disciplina Habilidades médicas, que faz parte do eixo de Saúde e Sociedade II, bem como a disciplina Anatomia Humana, ambas pertencentes à grade curricular de uma Universidade Federal do nordeste brasileiro. Desse modo, utilizou-se o trabalho voluntário do monitor, totalizando 12 horas/semanais, juntamente com os professores dos setores pertencentes à mesma instituição de nível superior que oferece a oportunidade pontual de realizar metodologias ativas, como sala de aula invertida, com assuntos/temas ofertados no início de uma aula prática e aplicada de modo didático para que os discentes ativamente usassem os seus saberes. Portanto, todo esse processo de modelos atuais de ensino foi executado pelos monitores, sendo supervisionado e orientado pelos professores. Logo, gerou riquezas múltiplas tanto para os estudantes que receberam esta forma de ensino, quanto para o corpo docente que alcançou o seu objetivo do “ensinar” e, sobretudo, para os monitores que puderam aprender ensinando os colegas: ponto nobre da educação.
Tratamento da alergia alimentar na população pediátrica: novas abordagens acerca do manejo da alergia à proteína do leite de vaca (APLV)
Authors: Marquetti Larissa Emanoelle Gonçalves , Souza Lara Maria Luz , De Santis Ester Azevedo , Da Silva Adailton , Oliveira Ana Paula da Silva , Soares Tainá Gleice Dias Justo , Gomes Rosane Campista , Longo Juliano Peixe , Saraiva Tarso Gomes , Gonçalves Thamires Cristina Dantas
Published: December 2023

A alergia à proteína do leite de vaca (APLV) é um diagnóstico comum em bebês e crianças, com uma prevalência em torno de 3% no público infantil em países desenvolvidos, a qual pode ser responsável por deficiências nutricionais caso não seja corretamente tratada. O presente estudo de revisão buscou avaliar novos avanços na abordagem terapêutica da alergia à proteína do leite de vaca (APLV) em crianças, documentados por meio de ensaios clínicos randomizados. Trata-se de uma pesquisa de revisão integrativa realizada por meio da base de dados PubMed, que levou em consideração os seguintes critérios de inclusão: testes controlados e randomizados; artigos publicados nos últimos 02 anos (2021-2023); que possuíam texto completo disponível e que abordassem acerca do manejo da APLV na população pediátrica. Ficou constatado que a imunoterapia oral em crianças com APLV possibilitou taxas significativamente mais altas de testes de provocação alimentar oral negativos, além de reduções nos níveis de IgE específicas do leite de vaca, com uma maior ingestão de leite ao longo dos anos sem efeitos adversos graves. Além disso, uma fórmula à base de aminoácidos (AAF) se mostrou bem tolerada em pacientes com APLV, sendo considerada uma opção dietética eficaz em crianças que não respondem bem à fórmulas hidrolisadas ou com formas graves da doença. Por fim, o produto proteico iAGE se mostrou seguro em crianças com APLV, apesar da falta de evidências na demonstração de benefícios com o uso da formulação empregada.
O impacto do processo ético-profissional segundo uma perspectiva subjetiva dos médicos acusados
Authors: De Araújo Catarina Carvalho Fontenelle , Portela Fernanda Cristina Almeida Ribeiro , Marques Isadora Maria de Carvalho , Pinho João Bruno Feitosa , Silva Marcelo Francisco Patrício , De Sousa Raquel Helena Kader Lopes , Cardoso Matheus do Valle Almeida Pires , Damásio Lia Cruz Vaz da Costa
Published: December 2023

O erro médico corresponde a conduta profissional inadequada que supõe uma inobservância técnica, capaz de produzir dano à vida ou agravo à saúde de outrem, mediante imperícia, imprudência ou negligência. O número de processo ético-profissional cresceu nos últimos anos e possui como especialidade que assume o primeiro lugar a ginecologia e obstetrícia. Trata- se de um estudo descritivo, observacional e retrospectivo realizado com médicos envolvidos em processos éticos na área de ginecologia e obstetrícia no CRM-PI no período de 2010 a 2018 e visa identificar os impactos econômicos, profissionais e psicológicos aos acusados. Os dados foram coletados a partir de questionário online a fim de colher as experiências subjetivas. Os resultados retratam que o processo ético profissional provocou reações e percepções dos entrevistados de formas distintas, de modo que, para maioria, trouxe consequências negativas, as quais foram interpretadas a fim de entender os motivos dos seus impactos.
Malefícios associados ao uso prolongado de dentifrícios a base de carvão ativado: revisão integrativa
Authors: De Almeida Junior Francisco Calisto , Barbosa Armando Cesar Ataide , Nantes Hengsther Billy Graham Batista , Diniz Ana Carolina Soares
Published: December 2023

Atualmente há uma grande procura por tratamentos que envolvam a estética dental, principalmente com a coloração dos dentes e neste aspecto a mídia exerce uma grande influência no público que tem interesse em ter um sorriso mais claro. Muito destaque tem sido dado em relação aos dentifrícios à base de carvão ativado, que vem se tornando uma opção bastante atraente aos consumidores. O objetivo desse estudo é analisar os malefícios do uso prolongado de dentifrícios a base de carvão ativado na estrutura dental e identificar as consequências do uso diário desse produto. Para realização desta revisão integrativa foram feitas buscas nas bases de dados PubMed, Scielo e BVS, utilizando palavras-chave indexadas no Descritores de Saúde (Decs) combinadas com os operadores booleanos. Após a avaliação dos artigos segundo os critérios de inclusão e exclusão, 11 artigos foram selecionados para a análise qualitativa. Os estudos apontam que as pastas que contem carvão ativado com uso continuo acaba danificando as estruturas dentárias, causando o aumento da rugosidade superficial e desgaste de esmalte e dentina, fazendo com que haja acúmulo de biofilmes, já no processo químico esse produto a base de carvão ativado com interação com os íons de flúor, faz com que inibe a sua ação protetora que tem um processo fundamental na remineralização dental.
Edentulismo no Brasil: impactos na saúde da população idosa com foco na atenção primária à saúde
Authors: Marcelino William Max do Nascimento , Belarmino Maria Clarice Conceição , Mendes Cacio Lopes , Ribeiro Adriana da Costa
Published: December 2023

O modelo de atenção primária à saúde (APS) proporcionou mudanças na organização dos processos de trabalho dentro do Sistema Único de Saúde (SUS). No contexto da saúde bucal, a inserção das equipes odontológicas na estratégia de saúde da família (ESF), além de ter possibilitado o aumento do número de cirurgiões-dentistas na APS, alterou o modelo de atenção à saúde bucal. Apesar disso, o edentulismo ainda é um problema de grande impacto na qualidade de vida da população idosa. O objetivo deste estudo foi discorrer sobre os fatores que influenciam o edentulismo no Brasil, bem como, seu impacto na vida social do idoso. O levantamento bibliográfico foi  conduzido no PubMed/Medline, LILACS e SciELO, utilizando-se os seguintes descritores: Qualidade de Vida; Saúde da Família; Edentulismo. O edentulismo provoca grande impacto na saúde da pessoa idosa, que compreende desde perdas funcionais às influências psicológicas. Em relação ao bem-estar do indivíduo, há evidências de que a perda de dentes influenciam negativamente na qualidade de vida do paciente e de que a reabilitação protética é capaz de devolver a autoestima e melhor qualidade de saúde bucal. Dado o exposto, o edentulismo exerce grande influência psicossocial, de forma que a perda dos dentes causa impactos negativos e piora sua qualidade de vida, afetando as condições física, funcional e psicológicas do indivíduo.
Tireoidite de Hashimoto: uma revisão de literatura
Authors: Roller Luísa de Faria , Ribeiro Raíssa Sousa Borges , Lima Emilly Ferreira , De Resende Gabriella Costa , Freitas Amanda Gabriela Ramos , Sobrosa Amanda Alves , De Freitas Martha Carvalho , Costa Marcos Dias Coelho , De Sousa Daniela Almeida Alves , Leite Larissa de Holanda
Published: December 2023

A Tireoidite de Hashimoto (TH) é uma endocrinopatia autoimune, que se caracteriza pela degradação dos tecidos da tireoide por meio de autoanticorpos. Além disso, é uma doença que ocorre em qualquer sexo e idade, sendo mais prevalente em mulheres e na faixa etária entre 30 e 50 anos. Sabe-se também que a patologia pode cursar de diferentes formas e não ter um quadro clínico tão específico. Por isso, o presente trabalho, por meio de uma revisão integrativa da literatura, teve como objetivo: elucidar as manifestações clínicas, o diagnóstico e o tratamento da Tireoidite de Hashimoto. Foi realizada uma busca nas bases de dados: Biblioteca Virtual de Saúde (BVS), Scientific Eletronic Online (Scielo) e PubMed, por meio dos descritores: “Tireoidite de Hashimoto”, “Hipotireoidismo”, e 8 artigos foram utilizados nesse estudo. Os resultados evidenciaram que no processo de degradação dos tecidos tireoidianos, em um mecanismo compensatório, a TH cursa com hipertireoidismo e, após a destruição dos tecidos, a doença, enfim, assume o hipotireoidismo. Além disso, observou-se que a dosagem de autoanticorpos, TSH e hormônios tireoidianos, a punção aspirativa por agulha fina e a ultrassonografia são métodos diagnósticos eficazes. Por fim, o tratamento preconizado é a monoterapia com Levotiroxina, com orientações imprescindíveis para o uso correto do medicamento.
Terapia antiangiogênica na Retinopatia Diabética: uma revisão de literatura
Authors: Costa Filho José Ribamar , Santini Karoliny Rodrigues , De Menezes Alexandre Bandeira , Soares Felipe Lima , De Souza João Vitor Frota , Costa Rafael de Souza , Macedo Cinthia Alencar , Paiva Isabel Braga
Published: December 2023

Objetivo: Revisar as atuais evidências de segurança e eficácia das terapias antiangiogênicas, além de analisar o possível impacto do custo de incorporação destes medicamentos no tratamento do edema macular diabético (EMD). Método: Estudo dedutivo de natureza básica e explicativo diante do objetivo proposto, com abordagem qualitativa através de uma revisão de literatura com busca nas plataformas PubMed, Scielo e MedLine. Resultado: Foram selecionados 15 estudos nacionais e internacionais, entre revisões sistemáticas, estudos retrospectivos e pesquisas quantitativas com coletas de dados. Conclusão: A terapia antiangiogênica (anti-VEGF) apresenta eficácia e segurança de uso comprovadas no tratamento do EMD, com complicações sistêmicas e oculares associadas às injeções intravítreas relativamente baixas, proporcionando melhora significativa na acuidade visual e na qualidade de vida dos pacientes após as aplicações. Apesar disso, 50% dos pacientes tratados com as injeções anti-VEGF não apresentaram resposta completa ou são refratários a essa abordagem terapêutica, indicando a necessidade de mais estudos para avaliar os fatores prognósticos. O Bevacizumabe foi a opção financeira mais viável em todos os cenários analisados, mesmo tendo sua aplicação clínica off-label.