Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "sound level meter" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Sound Level Meter as Software Application
    Autorzy:
    Barański, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1360105.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.38.Kb
    43.58.Dj
    Opis:
    Nowadays, technical possibilities to build and implement new solution in industry or scientists research are very wide. PC computer with dedicated environmental software makes building equipment previously reserved to FPGA systems possible. In this article we focus on building a sound level meter application. The main reason to undertake this problem was to check precision of sound level meter consisting of a dedicated computer program and the main board integrated sound card. All algorithms were implemented in LabVIEW 8.6, thus we call our system SLM_LV_v1.2c. In testing SLM_LV_v1.2c we have performed the calibration procedure in the Vibroacoustics Laboratory of the Department of Mechanics and Vibroacoustics (a Calibration Laboratory accredited by Polish Centre for Accreditation). The presented results show that our meter in a specific range meets requirements for 1st class sound level meters. Certainly, we can not use it as regular sound level meter without any other research like e.g. type approval, but at the same time we can consider it to be an inexpensive sound level indicator.At the end of the paper, we present results of comparison between measurements obtained with SLM_LV_v1.2c and the popular sound level meter SVAN 945A and show some sources of errors.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-66-A-70
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Educational Implementation of a Sound Level Meter in the LabVIEW Environment
    Autorzy:
    Barański, R.
    Wszołek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/177784.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LabVIEW
    acoustics
    sound level meters
    microphones
    free-field investigation
    frequency responses
    Opis:
    As a consequence of recent implementations of EU Directives related to noise protection more and more students of various AGH-UST programs are introduced to the basics of acoustic measurements. Students at various levels of theoretical background in the field of acoustic measurements are offered practical training in measurements using digital sound analyzers. The situation would be optimal if each student could have a device at his/her own disposal. Unfortunately, such a situation is not possible at the moment because of various reasons. With the above problem in mind, a dedicated software package has been developed, implemented in the LabVIEW environment, which allows detailed studies of problems related to the acoustic signal measurement using sound level meters, as well as tasks in spectral analysis (1/1 and 1/3 band filters) and narrow-band (FFT) analysis. With such organization during the introductory laboratory classes each student is offered a direct individual contact with a virtual device that is properly pre-programmed for realization of a well-constructed learning process. It definitely facilitates understanding of the essence of acoustic signal measurements and provides a good basis for further laboratory work carried out as a team-activity.
    Źródło:
    Archives of Acoustics; 2013, 38, 1; 19-26
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Analysis Using Sound Level Meter to Determine the Period of Usage of the Spindle Bearing of a Radial Drilling Machine
    Autorzy:
    Charles, S.
    Vijaya, Joslin D.
    Powiązania:
    https://bibliotekanauki.pl/articles/176769.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    acoustical condition monitoring
    radial drilling machine
    spindle bearing
    sound level meter
    sound pressure level
    sound muting transducer
    Opis:
    The condition monitoring techniques like acoustic emission, vibration analysis, and infrared thermography, used for the failure diagnosis of bearings, require longer processing time, as they have to per form acoustical measurement followed by signal processing and further analysis using special software. However, for any bearing, its period of usage can be easily determined within an hour, by measuring the bearing sound, using sound level meter (SLM). In this paper the acoustical analysis of the spindle Bering of a radial drilling machine was performed using SLM, by measuring the sound pressure level of the bearing in decibels, for different frequencies, while muting all the other noises. Then using an experimental set up, two database readings were taken, one for new bearing and the other for completely damaged bearing, both are SKF6207, which itself is the spindle bearing. From these three sets of sound pressure level readings, the period of usage of the spindle bearing, was calculated using an interpolation equation, by substituting the life of the bearing from the manufacturer’s catalogue. Therefore, for any machine with a SKF6207 bearing, its usage time can be estimated using the database readings and one measurement on that machine, all with the same speed.
    Źródło:
    Archives of Acoustics; 2019, 44, 3; 505-510
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accredited Calibration Laboratory for Sound Measurements
    Autorzy:
    Podgórski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/114156.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ISO / IEC 17025 standard
    accreditation of calibration laboratory
    calibration of sound level meter
    acoustic calibrator
    band-pass filters
    personal sound exposure meter
    Opis:
    The article presents basic concepts related to accredited calibration laboratories in accordance with ISO/IEC 17025. It describes in detail one of the only few existing in Poland calibration laboratories which deals with instruments for sound measurements. This laboratory is an interesting case as it is the only one in Poland, located in a company developing new instruments, producing, selling them and conducting their service in all over the world. Thanks to this location, the laboratory is able to provide their services not only in Poland but also abroad, which could affect revenues. In the paper laboratory equipment is presented and the innovative ways to increase measurement throughput is discussed. The calibration and measurement capability developed on the basis of uncertainty budgets is given. The activities carried out during the calibration are presented as well as the contents of the first page of the certificate. In the conclusions the strengths of the laboratory are listed.
    Źródło:
    Measurement Automation Monitoring; 2016, 62, 8; 250-253
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise vulnerability mapping using geospatial technique in part of Ibadan north east local government area
    Autorzy:
    Oni, Olukunle O.
    Adetimirin, O. I.
    Ajibade, S. A.
    Kolade, K. R.
    Ilesanmi, O. I.
    Akinluyi, F. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189960.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Digital Sound Level Meter (DSLM)
    Inverse Distance Weighted (IDW)
    Mean Noise Level
    Noise Level Point
    and Sound Level for Morning
    Afternoon and Evening (Lm_a_e)
    Opis:
    Human activity is main source of all environmental pollutions. Noise is common environmental issuesthat cannot be generated without geospatial location. It has great impact on mankind such as physical disturbance, physiological disturbance and affects human health. The aim of this research work is to identify the geospatial noise level and mapping noise vulnerability in some part of Ibadan North East Local Government Area. DSLM and GPS are used for survey method in which sixteen different location points were selected for noise vulnerability. The Mathematical Model is used to calculate Equivalent continuous sound level for morning, afternoon and evening (Lm_a_e), mean noise level for the morning, afternoon, evening and Daily Average of Noise values were generated. World Health Organization (WHO) recommendation standard was used as a standard in this research because Nigeria Noise pollution bill is still under consideration in the National Assembly. ArcGIS software was used for analysis and noise zones were carved out based on WHO yardsticks. Noise vulnerability mapping generated shown that land uses within the study area were experiencing very higher noise levels which are risky to the environment and society. Environmental agency and Government should set standard values for the noise barriers by passing the noise bill in the National Assembly assiduously and soonest.
    Źródło:
    World Scientific News; 2016, 52; 143-161
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Industrial noise level study in a wheat processing factory in Ilorin, Nigeria
    Autorzy:
    Ibrahim, I.
    Ajao, K. R.
    Aremu, S. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/265416.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    poziom szumów
    cyfrowy miernik szumów
    hałas
    wheat processing
    noise level
    digital sound meter
    questionnaire
    hearing protector
    Opis:
    An industrial process such as wheat processing generates significant noise which can cause adverse effects on workers and the general public. This study assessed the noise level at a wheat processing mill in Ilorin, Nigeria. A portable digital sound level meter HD600 manufactured by Extech Inc., USA was used to determine the noise level around various machines, sections and offices in the factory at pre-determined distances. Subjective assessment was also mode using a World Health Organization (WHO) standard questionnaire to obtain information regarding noise ratings, effect of noise on personnel and noise preventive measures. The result of the study shows that the highest noise of 99.4 dBA was recorded at a pressure blower when compared to other machines. WHO Class-4 hearing protector is recommended for workers on the shop floor and room acoustics should be upgraded to absorb some sounds transmitted to offices.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 511-523
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies