Decibel levels during extracorporeal lithotripsy for salivary stones

2008 ◽  
Vol 122 (12) ◽  
pp. 1305-1308 ◽  
Author(s):  
M H Fritsch
Keyword(s):  
Human Perception ◽  
Patient Survey ◽  
Acoustic Trauma ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Sound Levels ◽  
Extracorporeal Lithotripsy ◽  
Level Meter ◽  
Cross Reference

AbstractPurpose:To determine the decibel sound pressure levels generated during extracorporeal lithotripsy for salivary stones, and if such lithotriptor noise levels have the potential for acoustic trauma.Patients and materials:Minilith SL-1 salivary gland lithotriptor, sound level meter; five patient survey.Methods:Decibel measurements were conducted on the lithotripter-generated sounds, using a sound level meter at specific distances from the active element. In addition, a patient survey was conducted as a cross-reference, to enable comparison of predicted results with actual human perception of sound levels.Results:Sound levels ranged between 68 and 80 dB during treatment sessions, for both the lithotriptor operator and the patient.Conclusion:During routine use, no acoustic trauma is incurred by either the lithotriptor operator or the patient.

How Well Mobile Phone App DecibelX Measures Noise and the Usability Study

2019 ◽  
Author(s):  
Ravinder Thaper ◽  
Murray Gibson ◽  
Mathew Reed ◽  
Wallace Morris ◽  
Aravind Reddy Putta
Keyword(s):  
Pure Tone ◽  
Narrow Band ◽  
Sound Level ◽  
Smartphone App ◽  
Usability Study ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Traditional Use ◽  
Band Noise ◽  
Level Meter

This study aims to assess using a smartphone app (DecibelX), as a noise measuring alternative to the more costly traditional use of measuring noise levels with a Sound Level Meter (SLM). The study compares the accuracy of the app to readings taken with a SLM and dosimeter, and also evaluates the app’s performance for pure tone and narrow band noise. And a usability study identifies strengths and weaknesses related to usability of the app.

The Accuracy of Smartphone Sound Level Meter Applications (SLMAs) in Measuring Sound Levels in Clinical Rooms

2021 ◽  
Author(s):  
Yula C. Serpanos ◽  
Janet R. Schoepflin ◽  
Steven R. Cox ◽  
Diane Davis
Keyword(s):  
Research Design ◽  
Sound Level ◽  
National Standards ◽  
Hearing Level ◽  
Sound Level Meter ◽  
Chi Square ◽  
Sound Levels ◽  
Significant Difference ◽  
Level Meter ◽  
Chi Square Analysis

Abstract Background The accuracy of smartphone sound level meter applications (SLMAs) has been investigated with varied results, based on differences in platform, device, app, available features, test stimuli, and methodology. Purpose This article determines the accuracy of smartphone SLMAs with and without calibration of external and internal microphones for measuring sound levels in clinical rooms. Research Design Quasi-experimental research design comparing the accuracy of two smartphone SLMAs with and without calibration of external and internal microphones. Data Collection and Analysis Two iOS-based smartphone SLMAs (NIOSH SLM and SPL Meter) on an iPhone 6S were used with and without calibrated external and internal microphones. Measures included: (1) white noise (WN) stimuli from 20 to 100 dB sound pressure level in a sound-treated test booth and (2) sound levels in quiet in four nonsound-treated clinical rooms and in simulated background sound conditions using music at 45, 55, and 80 dBA. Chi-square analysis was used to determine a significant difference (p ≤ 0.05) in sound measures between the SLMAs and a Type 1 SLM. Results Measures of WN signals and room sound level measures in quiet and simulated background sound conditions were significantly more accurate at levels ≥ 40 dBA using the SLMAs with calibrated external and internal microphones. However, SLMA measures with and without calibration of external and internal microphones overestimated sound levels < 40 dBA. Conclusion The SLMAs studied with calibrated external or internal microphones are able to verify the room environment for audiologic screening at 1,000, 2,000, and 4,000 Hz at 20 dB hearing level (American Academy of Audiology and American Speech-Language-Hearing Association) using supra-aural earphones (American National Standards Institute S3.1–1999 [R2018]). However, the tested SLMAs overestimated low-level sound < 40 dBA, even when the external or internal microphones were calibrated. Clinicians are advised to calibrate the microphones prior to using measurement systems involving smartphones and SLMAs to measure room sound levels and to monitor background noise levels throughout the provision of clinical services.

scholarly journals Tingkat Kebisingan pada Angkutan Umum Jalur Teling-Pusat Kota Manado

e-CliniC ◽  
2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Marlisha C. B. Liono ◽  
Olivia C. P. Pelealu ◽  
Steward K. Mengko
Keyword(s):  
Exposure Time ◽  
Public Transportation ◽  
Threshold Value ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Cross Sectional ◽  
Level Meter ◽  
Microsoft Office ◽  
Audio System

Abstract: Noise is all unwanted sounds that can cause discomfort feeling or hearing disturb-ance if be exposed for long enough. Moreover, it can disturb the surrounding environment due to the generated noise. In Manado, many public transportation have audio system to play high volume music, therefore, causing noise. This study was aimed to determine the level of noise in public transportation of Teling to Manado downtown track. This was a descriptive and observational study with a cross sectional design. Samples were 100 vehicles of Teling to Manado downtown track. Noise measurement was performed by using a sound level meter. Data were analyzed by using Microsoft Office Excel. The results obtained 56 vehicles with audio systems and 44 vehicles without audio systems. Among 56 vehicles with audio systems, there were 47 vehicles that had noise levels above the noise threshold value which was 86.05-114.15 dB with exposure time about 8-16 hours. Meanwhile, among 44 vehicles without audio system, there were only 2 vehicles that had noise levels above threshold value which was 88.05-91.8 dB with exposure time about 10-12 hours. In conclusion, there were 49% of public vehicles had noise level above the threshold value.Keywords: noise; public transportation Abstrak: Kebisingan adalah semua bunyi yang tidak dikehendaki yang dapat menimbulkan ketidaknyamanan atau gangguan pendengaran jika terpapar lama. Selain itu kebisingan dapat juga mengganggu lingkungan sekitar. Di Kota Manado, banyak angkutan umum yang menggunakan sistem audio untuk memutar musik dengan volume yang tinggi sehingga menimbulkan kebisingan. Penelitian ini bertujuan untuk mengetahui tingkat kebisingan pada angkutan umum jalur Teling-Pusat Kota Manado. Jenis penelitian ialah observasional deskrip-tif dengan desain potong lintang. Sampel berjumlah 100 kendaraan pada jalur Teling-Pusat Kota Manado. Pengukuran kebisingan dilakukan menggunakan alat Sound Level Meter. Data diolah dengan Microsoft Office Excel. Hasil penelitian mendapatkan 56 kendaraan yang menggunakan sistem audio dan 44 kendaraan tidak menggunakan sistem audio. Pada 56 kendaraan yang menggunakan sistem audio terdapat 47 kendaraan dengan tingkat kebisingan di atas nilai ambang batas kebisingan yaitu 86,05-114,15 dB dengan waktu terpapar selama 8-16 jam sedangkan pada 44 kendaraan yang tidak menggunakan sistem audio terdapat 2 kendaraan yang memiliki tingkat kebisingan di atas nilai ambang batas kebisingan yaitu 88,05-91,8 dB dengan waktu terpapar selama 10-12 jam. Simpulan penelitian ini ialah terdapat 49% kendaraan umum memiliki kebisingan di atas nilai ambang batas.Kata kunci: kebisingan, angkutan umum

scholarly journals Measuring noise in classrooms: a systematic review

CoDAS ◽  
2014 ◽  
Vol 26 (2) ◽  
pp. 155-158 ◽  
Author(s):  
Vanessa Luisa Destro Fidêncio ◽  
Adriane Lima Mortari Moret ◽  
Regina Tangerino de Souza Jacob
Keyword(s):  
Systematic Review ◽  
Data Analysis ◽  
Descriptive Analysis ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noisy Environment ◽  
Inclusion Criteria ◽  
Noise Levels ◽  
Acoustic Adaptation ◽  
Level Meter

PURPOSE: The aim of this systematic review is to outline the main methodologies used for measuring noise in classrooms and if the noise levels found are suitable standards. METHODS: A survey of articles published in the last ten years, using six different databases. Were verified 1.088 publications and only eight studies met the inclusion criteria: (a) articles published in the last ten years, (b) articles available in full, (c) studies that have measured the noise in the classrooms of regular schools. Data analysis: descriptive analysis was performed of selected publications. RESULTS: Five studies conducted to measure the noise using a sound level meter. One measurement performed using a dosimeter and two studies used a laptop with audio recording software. In all classrooms, the noise level was higher than allowed. CONCLUSION: Classrooms are noisy environment and there is no standardization regarding the methodology that should be used to measure the noise in these places. Therefore, schools need to be guided constantly about the importance of acoustic adaptation in the classroom.

scholarly journals Noise levels of a track-laying tractor during field operations in the vineyard

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
Pietro Catania ◽  
Mariangela Vallone
Keyword(s):  
Sound Pressure ◽  
Health And Safety ◽  
Sound Level ◽  
Noise Levels ◽  
Test Conditions ◽  
Maximum Value ◽  
Sound Levels ◽  
Class 1 ◽  
Level Meter ◽  
Almost All

Noise in agriculture is one of the risk factors to be taken into account in the assessment of the health and safety of workers; in particular, it is known that the tractor is a source of high noise. The Italian Low Decree 81/2008 defined the requirements for assessing and managing noise risk identifying a number of procedures to be adopted at different noise levels to limit workers exposure. This paper concerns the analysis of the noise risk arising from the use of a tracklaying tractor during field operations carried out in the vineyard. The objective of this study was to evaluate the noise level that comes close to the ear of the operator driving the tractor measuring the values of equivalent sound level (Leq(A)) and peak sound pressure (LCpk). We considered four options related to the same tractor coupled with the following tools to perform some farming operations: rototilling, chisel plough, flail mowers and vibro farmer. We considered three test conditions: T1 in flat (slope 0%), T2 uphill and T3 downhill (both 30% slope). The instrument used for the measurements is a precision integrating portable sound level meter, class 1, model HD2110L by Delta OHM, Italy. Each survey lasted 2 minutes, with an interval of measurement equal to 0.5 s. The tests were performed in compliance with the standards ISO 9612 and ISO 9432. The results show that the measured sound levels exceed the limits allowed by the regulations in almost all the test conditions; values exceeding the threshold limit of 80 dB(A) were recorded coming up to a maximum value of 92.8 dB(A) for flail mowers in test T1. When limits imposed by the regulations are exceeded, the operator is obliged to wear the appropriate Personal Protective Equipment.

scholarly journals Noise Level Status in Siddharthanagar Municipality, Rupandehi, Nepal

2015 ◽  
Vol 5 ◽  
pp. 69-74
Author(s):  
Lakshmi Nath Bhattarai
Keyword(s):  
Noise Level ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Medical College ◽  
Commercial Area ◽  
Human Hearing ◽  
Level Meter ◽  
High Level ◽  
Digital Sound

Undesirable sound for human hearing is called as noise. It was measured at the selected locations of silent, residential and commercial zones of Siddharthanagar Municipality by using Dick Smith Digital Sound Level Meter Q 1362 for ‘A’ weighting in day time at 9:00 AM to 6:00 PM in the month of November and December 2012. The result shows that at each location the Leq noise levels are above than the noise level standard prescribed by Government of Nepal and WHO. Maximum Leq of 81.9 dB(A) was observed at the Bus park of commercial area and minimum 54.5 dB(A) was observed at Medical College area of silent zone. In other places, the Leq lie in the range 56.2 dB(A) to 81.9 dB(A). The study showed that the places lying along highways have high level of noise which is due to bad condition of roads, vehicles and unnecessary use of horns  The Himalayan Physics Vol. 5, No. 5, Nov. 2014 Page: 69-74

scholarly journals Effects of nightlife noise in a city center

Noise Mapping ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 228-235
Author(s):  
Gino Iannace ◽  
Amelia Trematerra ◽  
Ilaria Lombardi
Keyword(s):  
Southern Italy ◽  
Sound Level ◽  
Noise Levels ◽  
Negative Effects ◽  
City Center ◽  
Resident Population ◽  
Sound Levels ◽  
Mobile Stations ◽  
Level Meter ◽  
The City

Abstract The term Movida takes its name from the evening and night life of the city for their liveliness and animation. During the Movida, noise is one of the problems in the city centers due to the negative effects on the resident population. This paper reports the effects of noise due to the Movida phenomenon within the city center in southern Italy. Along the roads affected by the Movida phenomenon, the values of sound levels in dBA were measured both with fixed stations with a sound level meter and with mobile stations by wearing a noise dosimeter a participant of Movida. The measured noise levels are between 85 dBA to 90 dBA. The noise levels show that the Movida phenomenon generates disturbing conditions on the resident population with consequent conflict between club managers, patrons and residents.

scholarly journals ANALISIS KEBISINGAN PADA INSTITUSI PENDIDIKAN DI FRONTAGE ROAD SISI TIMUR JALAN A.YANI SURABAYA

2018 ◽  
Vol 3 (2) ◽  
pp. 70-77
Author(s):  
Widya Nilandita ◽  
Dyah Ratri Nurmaningsih ◽  
Shinfi Wazna Auvaria
Keyword(s):  
Noise Level ◽  
Teaching And Learning ◽  
Negative Impact ◽  
Educational Institution ◽  
Quality Standard ◽  
Sound Level ◽  
Educational Institutions ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Level Meter

Noise can occur anywhere, including at educational institutions. Noise research at educational institutions began to be studied a lot because of the negative impact on the teaching and learning process and disrupt the performance of teachers and students. Some studies show that schools or universities located on the edge of the road, show noise levels that exceed quality standards. This research was conducted at educational institutions located along the east Frontage Road Jl A.Yani Road, Surabaya, by measuring noise levels at 3 locations, in daylighting measurements with 4 measurement times (L1-L4). Data collection and processing was carried out by referring to the quality standard of KEPMENLH No. 48 of 1996. Data was measured using a sound level meter for 10 minutes for each measurement, with a reading every 5 seconds to obtain 120 data. Data processing results are compared with the standard noise level. The noise value at SD Margorejo I / 403 is 82.2 dB, UIN Sunan Ampel Surabaya is 79.76 dB, and SMK 3 Surabaya is 80.06 dB. The noise level value has exceeded the established quality standard, which has maximum of 55 dB for the educational intitutions area. The source of noise comes from the activities of motorized vehicles in and around educational institution that is quite crowded. Another cause of the high noise value is the train activities along the east frontage road Jl A.yani Surabaya, as well as the distance of the noise source with research location that relatively close. Keywords: noise, educational institution, sound level meter

scholarly journals Tingkat Kebisingan pada Angkutan Umum Jalur Teling-Pusat Kota Manado

e-CliniC ◽  
2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Marlisha C. B. Liono ◽  
Olivia C. P. Pelealu ◽  
Steward K. Mengko
Keyword(s):  
Exposure Time ◽  
Public Transportation ◽  
Threshold Value ◽  
Sound Level ◽  
Sound Level Meter ◽  
Noise Levels ◽  
Cross Sectional ◽  
Level Meter ◽  
Microsoft Office ◽  
Audio System

Abstract: Noise is all unwanted sounds that can cause discomfort feeling or hearing disturb-ance if be exposed for long enough. Moreover, it can disturb the surrounding environment due to the generated noise. In Manado, many public transportation have audio system to play high volume music, therefore, causing noise. This study was aimed to determine the level of noise in public transportation of Teling to Manado downtown track. This was a descriptive and observational study with a cross sectional design. Samples were 100 vehicles of Teling to Manado downtown track. Noise measurement was performed by using a sound level meter. Data were analyzed by using Microsoft Office Excel. The results obtained 56 vehicles with audio systems and 44 vehicles without audio systems. Among 56 vehicles with audio systems, there were 47 vehicles that had noise levels above the noise threshold value which was 86.05-114.15 dB with exposure time about 8-16 hours. Meanwhile, among 44 vehicles without audio system, there were only 2 vehicles that had noise levels above threshold value which was 88.05-91.8 dB with exposure time about 10-12 hours. In conclusion, there were 49% of public vehicles had noise level above the threshold value.Keywords: noise; public transportation Abstrak: Kebisingan adalah semua bunyi yang tidak dikehendaki yang dapat menimbulkan ketidaknyamanan atau gangguan pendengaran jika terpapar lama. Selain itu kebisingan dapat juga mengganggu lingkungan sekitar. Di Kota Manado, banyak angkutan umum yang menggunakan sistem audio untuk memutar musik dengan volume yang tinggi sehingga menimbulkan kebisingan. Penelitian ini bertujuan untuk mengetahui tingkat kebisingan pada angkutan umum jalur Teling-Pusat Kota Manado. Jenis penelitian ialah observasional deskrip-tif dengan desain potong lintang. Sampel berjumlah 100 kendaraan pada jalur Teling-Pusat Kota Manado. Pengukuran kebisingan dilakukan menggunakan alat Sound Level Meter. Data diolah dengan Microsoft Office Excel. Hasil penelitian mendapatkan 56 kendaraan yang menggunakan sistem audio dan 44 kendaraan tidak menggunakan sistem audio. Pada 56 kendaraan yang menggunakan sistem audio terdapat 47 kendaraan dengan tingkat kebisingan di atas nilai ambang batas kebisingan yaitu 86,05-114,15 dB dengan waktu terpapar selama 8-16 jam sedangkan pada 44 kendaraan yang tidak menggunakan sistem audio terdapat 2 kendaraan yang memiliki tingkat kebisingan di atas nilai ambang batas kebisingan yaitu 88,05-91,8 dB dengan waktu terpapar selama 10-12 jam. Simpulan penelitian ini ialah terdapat 49% kendaraan umum memiliki kebisingan di atas nilai ambang batas.Kata kunci: kebisingan, angkutan umum

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