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Volume 22
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10.3390/s22010010
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Article

The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth

by
Damian Węgrzyn
1,*,
Piotr Wrzeciono
2 and
Alicja Wieczorkowska
1,*
1
Polish-Japanese Academy of Information Technology, 02-008 Warsaw, Poland
2
Institute of Information Technology, Warsaw University of Life Sciences, 02-776 Warsaw, Poland
*
Authors to whom correspondence should be addressed.
Sensors 2022, 22(1), 10; https://doi.org/10.3390/s22010010
Submission received: 27 October 2021 / Revised: 13 December 2021 / Accepted: 17 December 2021 / Published: 21 December 2021
(This article belongs to the Special Issue Analytics and Applications of Audio and Image Sensing Techniques)
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Abstract

This paper describes the influence of the presence of an obstacle near the flue pipe’s mouth on the air jet, which directly affects the parameters of the sound generated by the flue pipe. Labial pipes of the most common types of mouth were tested. The method of interval calculus was used instead of invasive measuring instruments. The obtained results prove that the proximity of an obstacle affects the sound’s fundamental frequency, as the airflow speed coming out of the flue pipe’s mouth changes. The relationship between the airflow speed, the value of the Reynolds number, and the Strouhal number was also established. The thesis of the influence of the proximity of an obstacle on the fundamental frequency of the sound of a flue pipe was generalized, and formulas for calculating the untuning of the sound of the pipe were presented for various types of mouth.
Keywords: flue pipe; organ tuning; pipe’s mouth; obstacle flue pipe; organ tuning; pipe’s mouth; obstacle

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MDPI and ACS Style

Węgrzyn, D.; Wrzeciono, P.; Wieczorkowska, A. The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth. Sensors 2022, 22, 10. https://doi.org/10.3390/s22010010

AMA Style

Węgrzyn D, Wrzeciono P, Wieczorkowska A. The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth. Sensors. 2022; 22(1):10. https://doi.org/10.3390/s22010010

Chicago/Turabian Style

Węgrzyn, Damian, Piotr Wrzeciono, and Alicja Wieczorkowska. 2022. "The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth" Sensors 22, no. 1: 10. https://doi.org/10.3390/s22010010

APA Style

Węgrzyn, D., Wrzeciono, P., & Wieczorkowska, A. (2022). The Dependence of Flue Pipe Airflow Parameters on the Proximity of an Obstacle to the Pipe’s Mouth. Sensors, 22(1), 10. https://doi.org/10.3390/s22010010

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