{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T09:06:48Z","timestamp":1776935208803,"version":"3.51.2"},"reference-count":20,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2019,9,23]],"date-time":"2019-09-23T00:00:00Z","timestamp":1569196800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61622503, 61805132, 61575113, 11434007"],"award-info":[{"award-number":["61622503, 61805132, 61575113, 11434007"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"THORLABS GmbH","award":["PolySenSe Lab"],"award-info":[{"award-number":["PolySenSe Lab"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A theoretical model describing the acoustic coupling between two resonator tubes in spectrophones exploiting custom-made quartz tuning forks (QTFs) is proposed. The model is based on an open-end correction to predict the optimal tube length. A calculation of the sound field distribution from one tube exit allowed for the estimation of the optimal radius as a function of the QTF prong spacing and the sound wavelength. The theoretical predictions have been confirmed using experimental studies employing a custom QTF with a fundamental flexural mode resonance frequency of 15.8 kHz and a quality factor of 15,000 at atmospheric pressure. The spacing between the two prongs was 1.5 mm. Spectrophones mounting this QTF were implemented for the quartz-enhanced photoacoustic detection of water vapor in air in the mid-infrared spectral range.<\/jats:p>","DOI":"10.3390\/s19194109","type":"journal-article","created":{"date-parts":[[2019,9,23]],"date-time":"2019-09-23T11:02:00Z","timestamp":1569236520000},"page":"4109","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":38,"title":["Acoustic Coupling between Resonator Tubes in Quartz-Enhanced Photoacoustic Spectrophones Employing a Large Prong Spacing Tuning Fork"],"prefix":"10.3390","volume":"19","author":[{"given":"Stefano","family":"Dello Russo","sequence":"first","affiliation":[{"name":"PolySense Lab, Physics Department, Politecnico and University of Bari, CNR-IFN, I-70100 Bari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marilena","family":"Giglio","sequence":"additional","affiliation":[{"name":"PolySense Lab, Physics Department, Politecnico and University of Bari, CNR-IFN, I-70100 Bari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Angelo","family":"Sampaolo","sequence":"additional","affiliation":[{"name":"PolySense Lab, Physics Department, Politecnico and University of Bari, CNR-IFN, I-70100 Bari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7822-2397","authenticated-orcid":false,"given":"Pietro","family":"Patimisco","sequence":"additional","affiliation":[{"name":"PolySense Lab, Physics Department, Politecnico and University of Bari, CNR-IFN, I-70100 Bari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giansergio","family":"Menduni","sequence":"additional","affiliation":[{"name":"PolySense Lab, Physics Department, Politecnico and University of Bari, CNR-IFN, I-70100 Bari, Italy"},{"name":"Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell\u2019informazione, Politecnico of Bari, I-70126 Bari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongpeng","family":"Wu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7379-3388","authenticated-orcid":false,"given":"Lei","family":"Dong","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0802-4464","authenticated-orcid":false,"given":"Vittorio M. 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