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 "loudness" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-9 z 9
    Tytuł:
    Loudness Functions and Binaural Loudness Summation in Bilateral Cochlear Implant Users
    Autorzy:
    Kordus, M.
    Zera, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/177754.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    loudness
    binaural loudness
    loudness function
    binaural summation
    cochlear implant
    Opis:
    Loudness functions and binaural loudness summation was investigated in acoustically stimulated bilaterally implanted cochlear implant users. The study was aimed at evaluating growth of loudness functions and binaural loudness summation in cochlear implant subjects as a function of stimulus presentation level at different frequencies. Loudness was assessed using a rating procedure on a scale of 0 to 100. Three experimental conditions were tested: monaural right, monaural left and binaural, each with bands of noise with center frequencies of 0.25, 1, and 4 kHz. Fifteen implanted and five normal-hearing subjects (control group) participated in the experiments. Results demonstrated large variability in the slopes of the loudness functions and the presence of loudness summation in bilateral cochlear implant users, with large individual differences among subjects.
    Źródło:
    Archives of Acoustics; 2017, 42, 3; 351-364
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterizing Subjective Noisiness in Hospital Lobbies
    Autorzy:
    Chen, C.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/177865.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noisiness
    hospital
    annoyance
    loudness
    autocorrelation function
    reverberation time
    Opis:
    The present study was conducted in the lobbies of 16 Taiwanese urban hospitals to establish what contributes to the degree of noisiness experienced by patients and those accompanying them. Noise level measurements were then conducted by 15 min equivalent sound pressure levels (LAeq, 15m, dB) during daytime hours. The average LAeq itself was found to be poorly related to perceived noisiness. Levels variations were better correlated, more continual noise may actually be perceived as noisier. According to the findings of a multiple linear stepwise regression model (r = 0.91, R2 = 0.83), the 3 independent variables shown to have the largest effects on perceived noisiness were 1) 1/(L5−L95), 2) effective duration of the normalized autocorrelation function (_e, h), of all LAeq, 15m over 9–17, and 3) percentile loudness, N5, 15m. These results resemble previous studies that had assumed that a larger fluctuation of noise level corresponds to less annoyance experienced for mixed traffic noise studied in a laboratory situation. As an advanced approach, for hospital noise that consisted of 12 audible noise events, subjective noisiness were evaluated by the noise time structure analyzed by autocorrelation with loudness and levels variation.
    Źródło:
    Archives of Acoustics; 2015, 40, 2; 235-246
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Loudness Scaling Test Based on Categorical Perception
    Autorzy:
    Kostek, B.
    Odya, P.
    Suchomski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/178032.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    loudness scaling
    categorical perception
    musical instrument signals stimuli
    Opis:
    The main goal of this research study is focused on creating a method for loudness scaling based on categorical perception. Its main features, such as: way of testing, calibration procedure for securing reliable results, employing natural test stimuli, etc., are described in the paper and assessed against a procedurę that uses 1/2-octave bands of noise (LGOB) for the loudness growth estimation. The Mann-Whitney U-test is employed to check whether the proposed method is statistically equivalent to LGOB. It is shown that loudness functions obtained in both methods are similar in the statistical context. Moreover, the band-filtered musical instrument signals are experienced as more pleasant than the narrow-band noise stimuli and the proposed test is performed in a shorter time. The method proposed may be incorporated into fitting hearing strategies or used for checking individual loudness growth functions and adapting them to the comfort level settings while listening to music.
    Źródło:
    Archives of Acoustics; 2016, 41, 4; 637-648
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Psychoacoustic Characteristics of Tinnitus in Relation to Audiometric Profile
    Autorzy:
    Ristovska, Lidija
    Jachova, Zora
    Stojcheska, Vase
    Powiązania:
    https://bibliotekanauki.pl/articles/177581.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    tinnitus pitch
    tinnitus loudness
    audiogram
    edge frequency
    hearing loss
    Opis:
    The aim of the study was to examine the relationship between tinnitus pitch and maximum heating loss, frequency range of hearing loss, and the edge frequency of the audiogram, as well as, to analyze tinnitus loudness at tinnitus frequency and normal hearing frequency. The study included 212 patients, aged between 21 to 75 years (mean age of 54.4 ± 13.5 years) with chronic subjective tinnitus and sensorineural hearing loss. For the statistical data analysis we used Chisquare test and Fisher’s exact test with level of significance p < 0.05. Tinnitus pitch corresponding to the frequency range of hearing loss, maximum hearing loss and the edge frequency was found in 70.8%, 37.3%, and 16.5% of the patients, respectively. The majority of patients had tinnitus pitch from 3000 to 8000 Hz corresponding to the range of hearing loss (p < 0.001). The mean tinnitus pitch was 3545 Hz ± 2482. The majority (66%) of patients had tinnitus loudness 4-7 dB SL. The mean sensation level at tinnitus frequency was 4.9 dB SL ± 1.9, and 13 dB SL ± 2.9 at normal heating frequency. Tinnitus pitch corresponded to the frequency range of hearing loss in majority of patients. There was no relationship between tinnitus pitch and the edge frequency of the audiogram. Loudness matching outside the tinnitus frequency showed higher sensation level than loudness matching at tinnitus frequency.
    Źródło:
    Archives of Acoustics; 2019, 44, 3; 419-428
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Loudness Assessment of Musical Tones Equalized in A-weighted Level
    Autorzy:
    Klonari, D.
    Pastiadis, K.
    Papadelis, G.
    Papanikolaou, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/177354.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    loudness perception
    A-weighted level equalization
    wind instrument sounds
    Opis:
    The present study was carried out to determine whether recorded musical tones played at various pitches on a clarinet, a flute, an oboe, and a trumpet are perceived as being equal in loudness when presented to listeners at the same A-weighted level. This psychophysical investigation showed systematic effects of both instrument type and pitch that could be related to spectral properties of the sounds under consideration. Level adjustments that were needed to equalize loudness well exceeded typical values of JNDs for signal level, thus confirming the insufficiency of A-weighting as a loudness predictor for musical sounds. Consequently, the use of elaborate computational prediction is stressed, in view of the necessity for thorough investigation of factors affecting the perception of loudness of musical sounds.
    Źródło:
    Archives of Acoustics; 2011, 36, 2; 239-250
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preferred Levels of Auditory Danger Signals
    Autorzy:
    Żera, J.
    Nagórski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/90145.pdf
    Data publikacji:
    2000
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    auditory signals
    danger signals
    acoustics
    loudness
    sygnały ostrzegawcze
    sygnał dźwiękowy
    akustyka
    Opis:
    An important issue at the design stage of the auditory danger signal for a safety system is the signal audibility under various conditions of background noise. The auditory danger signal should be clearly audible but it should not be too loud to avoid fright, startling effects, and nuisance complaints. Criteria for designing auditory danger signals are the subject of the ISO 7731 (International Organization for Standardization [ISO], 1986) international standard and the EN 457 European standard (European Committee for Standardization [CEN], 1992). It is required that the A-weighted sound pressure level of the auditory danger signal is higher in level than the background noise by 15 dB. In this paper, the results of an experiment are reported, in which listeners adjusted most preferred levels of 3 danger signals (tone, sweep, complex sound) in the presence of a noise background (pink noise and industrial noise). The measurements were done for 60-, 70-, 80- and 90-dB A-weighted levels of noise. Results show that for 60-dB level of noise the most preferred level of the danger signal is 10 to 20 dB above the noise level. However, for 90-dB level of noise, listeners selected a level of the danger signal that was equal to the noise level. Results imply that the criterion in the existing standards is conservative as it requires the level of the danger signal to be higher than the level of noise regardless of the noise level.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2000, Zeszyt Specjalny; 111-117
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of all-pass filters application to eliminate negative effects of loudness war trend
    Analiza zastosowania filtrów wszechprzepustowych do eliminacji negatywnych skutków tendencji loudness war
    Autorzy:
    Surtel, Wojciech
    Maciejewski, Marcin
    Nowak, Krzysztof Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/408384.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    all-pass filter
    digital filter
    loudness war
    dynamic compression
    filtr wszechprzepustowy
    filtr cyfrowy
    kompresja dynamiki
    Opis:
    In this paper the influence of all-pass filters on musical material with applied hypercompression dynamics (loudness war trend) was analyzed. These filters are characterized by shifting phase in selected frequency band of signal, not by change of their amplitude levels. Because a lot of music information is present in music tracks, the dynamic range was tested together with influence of other sound parameters like selectivity or instruments’ arrangement on scene, by running subjective tests on a group of respondents.
    W artykule przeanalizowana wpływ filtrów wszechprzepustowych na materiał muzyczny z zastosowaną hiperkompresją sygnału (tendencją loudness war). Filtry tego typu, charakteryzują się przesunięciem w fazie składowych częstotliwościowych, sygnału, a nie zmianą poziomu ich amplitudy. Ze względu na dużą ilość informacji w utworach muzycznych, prócz sprawdzenia zakresu dynamiki poprzez testy obiektywne, zbadano również wpływ na inne parametry dźwięku takie jak selektywność czy rozłożenie instrumentów na scenie, poprzez testy subiektywne na grupie respondentów.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 2; 8-11
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja korekcji sygnału dźwiękowego z uwzględnieniem charakterystyk częstotliwościowych pomieszczenia oraz gatunku muzycznego
    Audio signal correction algorithm based on the room frequency characteristics and music genre
    Autorzy:
    Hoffmann, P.
    Kostek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/268987.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    korektor graficzny
    akustyka pomieszczeń
    LUFS
    gatunek muzyczny
    equalizer
    room acoustics
    Loudness Unit referenced to Full Scale
    music genre recognition
    Opis:
    W artykule została przedstawiona koncepcja automatycznego systemu korekcji z uwzględnieniem charakterystyki częstotliwościowej pomieszczenia oraz odtwarzanego gatunku muzycznego. Proponowany algorytm na podstawie charakterystyki częstotliwościowej pomieszczenia dokonuje kompensacji warunków akustycznych w otoczeniu emitera dźwięku. Dodatkowo w procesie kompensacji uwzględniana jest zawartość sygnału poprzez rozpoznanie rodzaju gatunku muzycznego. W artykule zostały pokrótce przedstawione parametry wykorzystywane w procesie rozpoznawania gatunków w kontekście liczby pasm częstotliwościowych użytych w korekcji dźwiękowej. Ponadto pokrótce omówiono środowisko Faust, w którym zaprojektowano korektor graficzny.
    A research study presents investigations of the influence of the room acoustics on the frequency characteristic of the audio signal playback. First, a concept of a novel spectral equalization method of the room acoustic conditions is introduced. On the basis of the frequency response of the room, a system for room acoustics compensation based on a designed equalizer is proposed. The system settings depend on music genre recognized automatically. In order to acquire room acoustic characteristics, a series of measurements are performed. Feature vector used in the process of identifying music genres is discussed in the context of the number of frequency bands designated for the equalizer proposed. Also, the Faust programming environment, in which the proposed equalizer is designed, is shortly outlined.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2016, 51; 63-66
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perceptually Correlated Parameters of Musical Instrument Tones
    Autorzy:
    Beauchamp, J. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/177352.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    musical timbre
    music synthesis
    loudness
    pitch
    duration
    attack
    decay
    spectral envelope
    spectral centroid
    spectral irregularity
    spectral flux
    vibrato
    inharmonicity
    discrimination
    dissimilarity relation
    multidimensional scaling (MDS)
    timbre transposition
    rms amplitude
    fundamental frequency
    correspondence
    Opis:
    In Western music culture instruments have been developed according to unique instrument acoustical features based on types of excitation, resonance, and radiation. These include the woodwind, brass, bowed and plucked string, and percussion families of instruments. On the other hand, instrument performance depends on musical training, and music listening depends on perception of instrument output. Since musical signals are easier to understand in the frequency domain than the time domain, much effort has been made to perform spectral analysis and extract salient parameters, such as spectral centroids, in order to create simplified synthesis models for musical instrument sound synthesis. Moreover, perceptual tests have been made to determine the relative importance of various parameters, such as spectral centroid variation, spectral incoherence, and spectral irregularity. It turns out that the importance of particular parameters depends on both their strengths within musical sounds as well as the robustness of their effect on perception. Methods that the author and his colleagues have used to explore timbre perception are: 1) discrimination of parameter reduction or elimination; 2) dissimilarity judgments together with multidimensional scaling; 3) informal listening to sound morphing examples. This paper discusses ramifications of this work for sound synthesis and timbre transposition.
    Źródło:
    Archives of Acoustics; 2011, 36, 2; 225-238
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

      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