scholarly journals Multimedia Archives: New Digital Filters to Correct Equalization Errors on Digitized Audio Tapes

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Niccolò Pretto ◽  
Edoardo Micheloni ◽  
Anthony Chmiel ◽  
Nadir Dalla Pozza ◽  
Dario Marinello ◽  
...  
Keyword(s):  
Electronic Music ◽  
Digital Filters ◽  
Ad Hoc ◽  
Video Art ◽  
Audio Tape ◽  
Digital Correction ◽  
Additional Correction ◽  
Listening Experience ◽  
Filter Type ◽  
Music Recordings

Multimedia archives face the problem of obsolescing and degrading analogue media (e.g., speech and music recordings and video art). In response, researchers in the field have recently begun studying ad hoc tools for the preservation and access of historical analogue documents. This paper investigates the active preservation process of audio tape recordings, specifically focusing on possible means for compensating equalization errors introduced in the digitization process. If the accuracy of corrective equalization filters is validated, an archivist or musicologist would be able to experience the audio as a historically authentic document such that their listening experience would not require the recovery of the original analogue audio document or the redigitization of the audio. Thus, we conducted a MUSHRA-inspired perception test (n = 14) containing 6 excerpts of electronic music (3 stimuli recorded NAB and 3 recorded CCIR). Participants listened to 6 different equalization filters for each stimulus and rated them in terms of similarity. Filters included a correctly digitized “Reference,” an intentionally incorrect “Foil” filter, and a subsequent digital correction of the Foil filter that was produced with a MATLAB script. When stimuli were collapsed according to their filter type (NAB or CCIR), no significant differences were observed between the Reference and MATLAB correction filters. As such, the digital correction appears to be a promising method for compensation of equalization errors although future study is recommended, specifically containing an increased sample size and additional correction filters for comparison.

scholarly journals Imperfect sound forever: loudness wars, listening formations and the history of sound reproduction

Popular Music ◽  
2013 ◽  
Vol 32 (2) ◽  
pp. 159-176 ◽  
Author(s):  
Kyle Devine
Keyword(s):  
Cultural History ◽  
Turn Of The Century ◽  
Controversial Issues ◽  
Average Volume ◽  
Sound Reproduction ◽  
Volume Level ◽  
History Of ◽  
Listening Experience ◽  
Historical Trajectory ◽  
Music Recordings

AbstractThe purpose of this paper is to provide some historical perspective on the so-called loudness war. Critics of the loudness war maintain that the average volume level of popular music recordings has increased dramatically since the proliferation of digital technology in the 1980s, and that this increase has had detrimental effects on sound quality and the listening experience. My point is not to weigh in on this debate, but to suggest that the issue of loudness in sound recording and playback can be traced back much earlier than the 1980s. In fact, loudness has been a source of pleasure, a target of criticism, and an engine of technological change since the very earliest days of commercial sound reproduction. Looking at the period between the turn-of-the-century format feud and the arrival of electrical amplification in the 1920s, I situate the loudness war within a longer historical trajectory, and demonstrate a variety of ways in which loudness and volume have been controversial issues in – and constitutive elements of – the history of sound reproduction. I suggest that the loudness war can be understood in relation to a broader cultural history of volume.

scholarly journals Digital filter for device of determining coordinates of radio signal source in satellite telecommunications systems

2020 ◽  
Vol 4 (4) ◽  
pp. 226-232
Author(s):  
V. V. Sukhotin ◽  
A. S. Tikhtenko ◽  
A. V. Zhgun ◽  
V. A. Sidorin
Keyword(s):  
Phase Difference ◽  
Digital Filter ◽  
Digital Filters ◽  
Radio Signal ◽  
Signal Source ◽  
Minimum Error ◽  
Filter Type ◽  
Band Pass

Work is devoted research of signal power dependence that will be used in the measurements and noise components of the signal from the digital filter type, filter parameters for various signal-to-noise ratios. The substantiation of the relevance of research is given, which consists in finding the possibility of using digital filters for a device for determining the coordinates of a radio signal source in satellite telecommunications, providing a minimum error in measuring the phase difference. The structure of the system for determining the coordinates of the radio signal source is given. The developed computer model and its description are presented. The researchers are considered for digital recursive band-pass filters of the Butterworth, Chebyshev type 1, Chebyshev type 2, Zolotarev-Cauer type, which are specified using a discrete linear system. Appropriate conclusions are drawn about the applicability of digital filters in the device for determining coordinates. The types of filters are determined and requirements are presented to ensure the minimum error in measuring the phase difference.

scholarly journals Tecnofagia: A Multimodal Rite

2019 ◽  
Author(s):  
Luzilei Aliel ◽  
Rafael Fajiolli ◽  
Ricardo Thomasi
Keyword(s):  
Electronic Music ◽  
Video Art ◽  
Digital Art ◽  
Cultural Aspects ◽  
Brazilian Art ◽  
Live Electronic Music ◽  
Collective Performance ◽  
And Performance ◽  
The Moment ◽  
Export Product

This is a concert proposal of Brazilian digital art, which brings in its creative core the historical and cultural aspects of certain locations in Brazil. The term ​ Tecnofagia derives from an allusion to the concept of anthropophagic movement (artistic movement started in the twentieth century founded and theorized by the poet Oswald de Andrade and the painter Tarsila do Amaral). The anthropophagic movement was a metaphor for a goal of cultural swallowing where foreign culture would not be denied but should not be imitated. In his notes, Oswald de Andrade proposes the "cultural devouring of imported techniques to re-elaborate them autonomously, turning them into an export product." The ​ Tecnofagia project is a collaborative creative and collective performance group that seeks to broaden aspects of live electronic music, video art, improvisation and performance, taking them into a multimodal narrative context with essentially Brazilian sound elements such as:accents and phonemes; instrumental tones; soundscapes; historical, political and cultural contexts. In this sense, ​ Tecnofagia tries to go beyond techniques and technologies of interactive performance, as it provokes glances for a Brazilian art-technological miscegenation. That is, it seeks emergent characteristics of the encounters between media, art, spaces, culture, temporalities, objects, people and technologies, at the moment of performance.

A Device to Mark Inaudible Behaviors on Audio Recordings

1987 ◽  
Vol 18 (3) ◽  
pp. 238-240
Author(s):  
Edward A. Shirkey ◽  
Ruben D. Kelly
Keyword(s):  
Speech And Language ◽  
Audio Tape ◽  
Speech Language Pathologists ◽  
Audio Recordings

A need exists for speech-language pathologists to have convenient and inexpensive ways to record, on audio tape, occurrences of important inaudible speech- and language-related behaviors. The device described below can be used to mark occurrences of such events.

Die COVID-19-Pandemie im akutstationären Setting aus Sicht von Führungspersonen und Hygienefachkräften in der Pflege

Pflege ◽  
2020 ◽  
Vol 33 (5) ◽  
pp. 289-298
Author(s):  
Katharina Silies ◽  
Angelika Schley ◽  
Janna Sill ◽  
Steffen Fleischer ◽  
Martin Müller ◽  
...  
Keyword(s):  
Ad Hoc ◽  
Qualitative Studie ◽  
Skill Mix ◽  
Task Forces

Zusammenfassung. Hintergrund: Die COVID-19-Pandemie ist eine Ausnahmesituation ohne Präzedenz und erforderte zahlreiche Ad-hoc-Anpassungen in den Strukturen und Prozessen der akutstationären Versorgung. Ziel: Ziel war es zu untersuchen, wie aus Sicht von Führungspersonen und Hygienefachkräften in der Pflege die stationäre Akutversorgung durch die Pandemiesituation beeinflusst wurde und welche Implikationen sich daraus für die Zukunft ergeben. Methoden: Qualitative Studie bestehend aus semistrukturierten Interviews mit fünf Verantwortlichen des leitenden Pflegemanagements und drei Hygienefachkräften in vier Krankenhäusern in Deutschland. Die Interviews wurden mittels qualitativer Inhaltsanalyse ausgewertet. Ergebnisse: Die Befragten beschrieben den auf die prioritäre Versorgung von COVID-19-Fällen hin umstrukturierten Klinikalltag. Herausforderungen waren Unsicherheit und Angst bei den Mitarbeiter_innen, relative Ressourcenknappheit von Material und Personal und die schnelle Umsetzung neuer Anforderungen an die Versorgungleistung. Dem wurde durch gezielte Kommunikation und Information, massive Anstrengungen zur Sicherung der Ressourcen und koordinierte Steuerung aller Prozesse durch bereichsübergreifende, interprofessionelle Task Forces begegnet. Schlussfolgerungen: Die in der COVID-19-Pandemie vorgenommenen Anpassungen zeigen Entwicklungspotenziale für die zukünftige Routineversorgung auf, z. B. könnten neue Arbeits- und Skill Mix-Modelle aufgegriffen werden. Für die Konkretisierung praktischer Implikationen sind vertiefende Analysen der Daten mit zeitlichem Abstand erforderlich.

Tests und Tools

2006 ◽  
Vol 5 (2) ◽  
pp. 68-71 ◽  
Author(s):  
Simone Kauffeld
Keyword(s):  
Ad Hoc ◽  
Non Profit

Zusammenfassung. Der FEO, der in Kooperation mit betrieblichen Praktikern entwickelt wurde, dient der Erfassung des Organisationsklimas. Er umfasst 82 Items und bildet 12 Skalen ab. Eine Stärke des FEO im Gegensatz zu ad hoc entwickelten Befragungsinstrumenten sind die Vergleichsdaten, die für Profit- und Non-Profit-Organisationen bereit gestellt werden. Kritisch diskutiert wird die theoretische Verortung, die Anwenderfreundlichkeit sowie der Nutzen der individuellen Auswertung. Die konsensuale, konvergente, diskriminante und kriterienbezogene Validierung steht aus.

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