scholarly journals Perceptual validation of sound environment reproduction inside an aircraft mock-up

2022 ◽  
Vol 98 ◽  
pp. 103603
Author(s):  
O. Valentin ◽  
P.-A. Gauthier ◽  
C. Camier ◽  
C. Verron ◽  
C. Guastavino ◽  
...  
Keyword(s):  
Sound Environment

scholarly journals A Case Study on Soundscape Analysis for the Historical and Ethnic Village of Dong Nationality in Zhaoxing County

Acoustics ◽  
2021 ◽  
Vol 3 (2) ◽  
pp. 221-234
Author(s):  
Zhiyong Deng ◽  
Kexin Dong ◽  
Danfeng Bai ◽  
Kaicheng Tong ◽  
Aili Liu
Keyword(s):  
Sound Pressure ◽  
Subjective Experience ◽  
Guizhou Province ◽  
Music Listening ◽  
Ethnic Music ◽  
Curve Fit ◽  
Sound Event ◽  
Sound Environment ◽  
Independent Variable

A soundscape is a sound environment of the awareness of auditory perception and social or cultural understandings. Based on a soundscape investigation in 2019 in the historical and ethnic village of Dong Nationality in Zhaoxing County, Guizhou Province of China, a case study on the soundscape analysis with the acoustical sound pressure level and an impressive sound event or soundmark is introduced in this paper. Furthermore, in order to determine the subjective soundscape experience and its influence by the length of background music listening, the independent variable “Length of Listening” and six adjective pairs, such as “Monotonous” to “Rich”, “Clamorous” to “Quiet”, “Stressing” to “Relaxing”, “Boring” to “Vivid”, “Noisy” to “Musical” and “Disliked” to “Preferable” are chosen to obtain a curve-fit, which shows that the length of the music listening background has a higher correlation to the subjective experience, and no sufficient attention has been paid to the context of the traditional soundscape preservation, ethnic music and quiet and soft ambient sounds.

Outdoor environmental investigation of old communities during summer in hot summer and cold winter regions

2020 ◽  
pp. 1420326X2097583
Author(s):  
Danyang Li ◽  
Kang Zhao ◽  
Jian Ge ◽  
Mengyu Ren
Keyword(s):  
Air Quality ◽  
Outdoor Environment ◽  
Key Factors ◽  
Factors Affecting ◽  
Environmental Investigation ◽  
Air Temperatures ◽  
Physical Environments ◽  
Sound Barriers ◽  
Sound Environment ◽  
Improvement Measures

The outdoor physical environments of many old communities are unable to meet modern living requirements and require improvement urgently. This is especially true for communities in regions with extremely hot summers and cold winters, which may cause additional difficulties. This study used measurements and questionnaire data to investigate outdoor environment (the thermal, sound, light environments and air quality) and resident sensations in four such communities. Results revealed some key factors affecting outdoor environmental comfort, including summer shading, winter sunlight, air temperature, air quality, the sound environment and odour. The results also revealed that the main problems were noise, insufficient illumination and high air temperatures in summer, all of which had seriously affected comfort during outdoor activities. Specifically, noise values during the most unfavourable periods were between 57.4 and 80.6 dB(A), while average air temperatures were between 32.3°C and 35.8°C, and average illuminances were below 2.9 lx. As such, this paper proposes improvement measures such as sound barriers and greening. Further, we propose a method for prioritizing these factors for such improvements based on a combination of subjective and objective factors. This study provides data and technical references for the reconstruction of old communities in regions with hot summers and cold winters.

scholarly journals Investigation of Water Quality Parameters from Ramna, Crescent and Hatirjheel Lakes in Dhaka City

2015 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
MS Islam ◽  
M Rehnuma ◽  
SS Tithi ◽  
MH Kabir ◽  
L Sarkar
Keyword(s):  
Water Quality ◽  
Lake Water ◽  
Public Awareness ◽  
Aquatic Organisms ◽  
Quality Parameters ◽  
Water Runoff ◽  
Dhaka City ◽  
Sound Environment ◽  
Surrounding Areas

The study was conducted to know the status of water quality of the Ramna, Crescent and Hatirjheel lakes in the Dhaka city. Water samples were collected from three different points of each lake and analyzed for various physicochemical parameters including temperature, pH, EC, TDS, DO, BOD, hardness, alkalinity, acidity during the period from November 2013 to April 2014. The mean temperature 22.54, 24.59 and 24.24°C; EC 15400, 282.00 and 618.27 ?Scm-1; TDS 85.38, 155.60 and 339.90 ppm; pH 7.73, 7.85 and 7.67; DO 3.51, 3.92 and 3.65 ppm; BOD 0.93, 0.73 and 3.15 ppm; hardness 95.00, 108.56 and 105.11 ppm; alkalinity 48.9, 120.7 and 249.1 ppm, and acidity 2.18, 2.67 and 2.05 ppm were investigated from Ramna, Crescent and Hatirjheel lakes, respectively. Lower concentration of DO was observed in all three lakes that severely harmed the aquatic organisms and degrade their habitat. The comparative study demonstrated that the concentration of BOD, EC, TDS, alkalinity and acidity of Hatirjheel Lake was higher than Ramna and Crescent lakes which indicated pollution of the lake water. The rain and storm water runoff, lack of awareness of people were responsible for the pollution of Ramna, Crescent and Hatirjheel lakes water. Connection of the sewerage line with the rain water collection channels and mixing of solid waste with lake water are the main reasons for pollution of Hatirjheel lake. Poor water quality of these lakes affects the ecosystem and aesthetic beauty negatively. To maintain the sound environment and healthy ecosystem of the lakes and the surrounding areas need proper management and monitoring and implementation of existing laws and regulations. Moreover public awareness is necessary otherwise it is hardly possible to maintain sound water quality of these three lakes.J. Environ. Sci. & Natural Resources, 8(1): 1-5 2015

scholarly journals Smartphone-Based System for Learning and Inferring Hearing Aid Settings

2016 ◽  
Vol 27 (09) ◽  
pp. 732-749 ◽  
Author(s):  
Gabriel Aldaz ◽  
Sunil Puria ◽  
Larry J. Leifer
Keyword(s):  
Noise Reduction ◽  
Hearing Aids ◽  
User Study ◽  
Hearing Aid ◽  
Sensor Data ◽  
Significant Preference ◽  
Environmental Sound ◽  
Sound Environment ◽  
Study Participants ◽  
Hearing System

Background: Previous research has shown that hearing aid wearers can successfully self-train their instruments’ gain-frequency response and compression parameters in everyday situations. Combining hearing aids with a smartphone introduces additional computing power, memory, and a graphical user interface that may enable greater setting personalization. To explore the benefits of self-training with a smartphone-based hearing system, a parameter space was chosen with four possible combinations of microphone mode (omnidirectional and directional) and noise reduction state (active and off). The baseline for comparison was the “untrained system,” that is, the manufacturer’s algorithm for automatically selecting microphone mode and noise reduction state based on acoustic environment. The “trained system” first learned each individual’s preferences, self-entered via a smartphone in real-world situations, to build a trained model. The system then predicted the optimal setting (among available choices) using an inference engine, which considered the trained model and current context (e.g., sound environment, location, and time). Purpose: To develop a smartphone-based prototype hearing system that can be trained to learn preferred user settings. Determine whether user study participants showed a preference for trained over untrained system settings. Research Design: An experimental within-participants study. Participants used a prototype hearing system—comprising two hearing aids, Android smartphone, and body-worn gateway device—for ˜6 weeks. Study Sample: Sixteen adults with mild-to-moderate sensorineural hearing loss (HL) (ten males, six females; mean age = 55.5 yr). Fifteen had ≥6 mo of experience wearing hearing aids, and 14 had previous experience using smartphones. Intervention: Participants were fitted and instructed to perform daily comparisons of settings (“listening evaluations”) through a smartphone-based software application called Hearing Aid Learning and Inference Controller (HALIC). In the four-week-long training phase, HALIC recorded individual listening preferences along with sensor data from the smartphone—including environmental sound classification, sound level, and location—to build trained models. In the subsequent two-week-long validation phase, participants performed blinded listening evaluations comparing settings predicted by the trained system (“trained settings”) to those suggested by the hearing aids’ untrained system (“untrained settings”). Data Collection and Analysis: We analyzed data collected on the smartphone and hearing aids during the study. We also obtained audiometric and demographic information. Results: Overall, the 15 participants with valid data significantly preferred trained settings to untrained settings (paired-samples t test). Seven participants had a significant preference for trained settings, while one had a significant preference for untrained settings (binomial test). The remaining seven participants had nonsignificant preferences. Pooling data across participants, the proportion of times that each setting was chosen in a given environmental sound class was on average very similar. However, breaking down the data by participant revealed strong and idiosyncratic individual preferences. Fourteen participants reported positive feelings of clarity, competence, and mastery when training via HALIC. Conclusions: The obtained data, as well as subjective participant feedback, indicate that smartphones could become viable tools to train hearing aids. Individuals who are tech savvy and have milder HL seem well suited to take advantages of the benefits offered by training with a smartphone.

scholarly journals The Seasonal Variation and Place Peculiarity of the Sound Environment in the TAMAGAWA River

1993 ◽  
Vol 11 ◽  
pp. 175-182
Author(s):  
Toshio FUJIHARA ◽  
Shinichi KITAMURA ◽  
Toshihiro KASAMATSU ◽  
Yasuo KAI
Keyword(s):  
Seasonal Variation ◽  
Sound Environment

scholarly journals Effect of sound environment on homework performance

2016 ◽  
Vol 13 (2) ◽  
pp. 79-86
Author(s):  
Mine Aşcıgil Dincer ◽  
Sevtap Yılmaz
Keyword(s):  
Sound Environment

scholarly journals Neglected scenario of sanitation in schools of Sunsari district of Nepal: Critical sphere for public health consideration

2017 ◽  
Vol 13 (2) ◽  
pp. 114-124
Author(s):  
Pramila Rai ◽  
R B Sah ◽  
R Rijal ◽  
PK Pokharel
Keyword(s):  
Public Schools ◽  
Water Supply ◽  
School Environment ◽  
Simple Random Sampling ◽  
Vital Role ◽  
Septic Tank ◽  
Sanitation And Hygiene ◽  
The Status ◽  
Sound Environment ◽  
Equal Right

Background: Provision of adequate water supply, sanitation facilities, hygiene and waste management in schools reduces the disease burden among children, staff and their families. Every child has equal right to grow in a safe and sound environment. However, levels of water supply, sanitation and hygiene are unacceptable in many schools worldwide.Method: Study included forty schools comprising twenty public and twenty private schools of Sunsari district selected by simple random sampling method. The status of school environment and sanitation were assessed by using observation and interview method using observation checklist, questionnaires and photographs.Result: Two public schools were completely devoid of sanitary facilities though toilet facility was present physically. Students couldn’t use toilet due to lack of water in one school due to theft of tube well and septic tank of the toilet was full in another school. Other remaining schools didn’t have satisfactory, clean and proper sanitary facilities. Only few schools had convenient hand washing point.Conclusion: Sanitation facilities were in neglected state evidenced by unavailability of sanitation facilities even though that was physically present and the sanitation facilities were in pitiable condition including cleanliness, water supply. All the stakeholders including school management, supervisors, parents, teachers, students should be ready to play vital role on their own. Lack of one toilet affects no. of students and people of surrounding area and raises of risk of soil transmitted diseases so this situation demands attention of authorities and other stakeholders.Health Renaissance 2015;13(2): 114-124

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