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Investigations of Helmholtz Resonators with Curved Tapered Embedded Neck Extension

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Zhanlu Chen

Applied Physics · Submitted 18 Sep 2023

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Results revealed that a tapered curved embedded neck configuration led to a lower absorption frequency as the outlet/inlet ratio increased trend to convergent neck geometry.

how it is stated · asserted 1.00 read the record →

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arXiv ID2309.09852 (version 1)
Pith ID6PIYI7JS, Pith's permanent record of this paper and its review
CitationZhanlu Chen. "Investigations of Helmholtz Resonators with Curved Tapered Embedded Neck Extension." arXiv:2309.09852 (2023). https://pith.science/paper/6PIYI7JS
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,844 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.06 · human participants 0.02 · controlled comparison 0.09 · randomized assignment 0.01 · states quantitative result 0.09 · compares with prior results 0.09 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

In this study, the performance of Helmholtz resonators with curved tapered neck extensions was investigated through numerical and experimental methods. A numerical parametric analysis was carried out using the Finite Element Method with COMSOL, while experimental validation was conducted using a two-microphone acoustic impedance tube. The analysis evaluated the effects of neck outlet/inlet diameter ratio, neck length, and diameter of the neck on the absorption coefficients and resonance frequency of the resonators. Results revealed that a tapered curved embedded neck configuration led to a lower absorption frequency as the outlet/inlet ratio increased trend to convergent neck geometry. Furthermore, a longer effective neck length and smaller neck diameter enhanced low-frequency noise absorption. Experimental validation with four 3D-printed samples confirmed these trends.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 In this study, the performance of Helmholtz resonators with curved tapered neck extensions was investigated through numerical and experimental methods. contribution 1.00 0.93 0.03 asserted 0.95
s1 A numerical parametric analysis was carried out using the Finite Element Method with COMSOL, while experimental validation was conducted using a two-microphone acoustic impedance tube. method 1.00 0.94 0.02 asserted 1.00
s2 The analysis evaluated the effects of neck outlet/inlet diameter ratio, neck length, and diameter of the neck on the absorption coefficients and resonance frequency of the resonators. method 0.81 0.91 0.04 asserted 0.91
s3 Results revealed that a tapered curved embedded neck configuration led to a lower absorption frequency as the outlet/inlet ratio increased trend to convergent neck geometry. result 1.00 0.94 0.44 asserted 1.00
s4 Furthermore, a longer effective neck length and smaller neck diameter enhanced low-frequency noise absorption. result 0.99 0.92 0.30 asserted 1.00
s5 Experimental validation with four 3D-printed samples confirmed these trends. method 0.54 0.95 0.08 asserted 1.00

What kind of paper the classifier reports this is: empirical study 0.75 · evidence from observation or experiment 0.72.

What was examined, and what was not

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  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

In this study, the performance of Helmholtz resonators with curved tapered neck extensions was investigated through numerical and experimental methods. A numerical parametric analysis was carried out using the Finite Element Method with COMSOL, while experimental validation was conducted using a two-microphone acoustic impedance tube. The analysis evaluated the effects of neck outlet/inlet diameter ratio, neck length, and diameter of the neck on the absorption coefficients and resonance frequency of the resonators. Results revealed that a tapered curved embedded neck configuration led to a lower absorption frequency as the outlet/inlet ratio increased trend to convergent neck geometry. Furthermore, a longer effective neck length and smaller neck diameter enhanced low-frequency noise absorption. Experimental validation with four 3D-printed samples confirmed these trends.

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