Strategic noise mapping of the agglomeration of Bologna, Italy

Thermoacoustic resonance is a difficult technical problem that is experienced by almost all lean-premixed combustors. The Industrial Trent combustor is a novel dry-low-emissions (DLE) combustor design, which incorporates three stages of lean premixed fuel injection in series. The three stages in series allow independent control of two stages — the third stage receives the balance of fuel to maintain the desired power level — at all power conditions. Thus, primary zone and secondary zone temperatures can be independently controlled. This paper examines how the flexibility offered by a 3-stage lean premixed combustion system permits the implementation of a successful combustion noise avoidance strategy at all power conditions and at all ambient conditions. This is because at a given engine condition (power level and day temperature) a characteristic “noise map” can be generated on the engine, independently of the engine running condition. The variable distribution of heat release along the length of the combustor provides an effective mechanism to control the amplitude of longitudinal resonance modes of the combustor. This approach has allowed the Industrial Trent combustion engineers to thoroughly “map out” all longitudinal combustor acoustic modes and design a fuel schedule that can navigate around regions of combustor thermoacoustic resonance. Noise mapping results are presented in detail, together with the development of noise prediction methods (frequency and amplitude) that have allowed the noise characteristics of the engine to be established over the entire operating envelope of the engine.

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Accuracy assessment of noise mapping on the main street

Arabian Journal of Geosciences ◽

10.1007/s12517-017-3343-z ◽

2017 ◽

Vol 11 (1) ◽

Author(s):

Bülent Bostanci

Keyword(s):

Accuracy Assessment ◽

Noise Mapping ◽

Main Street

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Integrating environmental noise considerations into public policy: the case of Ireland

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-2340 ◽

2021 ◽

Vol 263 (3) ◽

pp. 3218-3222

Author(s):

Jon Paul Faulkner ◽

Enda Murphy

Keyword(s):

Noise Exposure ◽

Environmental Noise ◽

Management Policy ◽

Policy And Practice ◽

Noise Mapping ◽

Current Application ◽

Eu Member States ◽

Mapping Process ◽

Irish Case ◽

Harmful Effects

European Commission Directive (EU) 2020/367 describes how harmful effects from environmental noise exposure are to be calculated for ischemic heart disease (IHD), high annoyance (HA), and high sleep disturbance (HSD) for road, rail, and aircraft noise under the Environmental Noise Directive's (END) strategic noise mapping process. It represents a major development in understanding the extent of exposure from transport-based environmental noise given it is a legal requirement for all EU member states from the 2022 reporting round. It also has the potential to accelerate the development of stronger noise-health policies across the EU. While this development is to be welcomed, there are a number of basic noise-health policy applications that first need to be implemented in the Irish case if the noise-health situation is be accurately assessed and if public health is to be adequately protected. In order to address this requirement the following paper presents concrete policy and practice recommendations as well as an evaluation of the current application of noise management policy in Ireland which is administered to protect the public from the harmful effects of environmental noise. This paper provides guidance on how noise-health considerations can be integrated into key relevant areas of Irish policy including healthcare, the environment, transportation, and planning.

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Umgebungslärmrichtlinie in Schleswig-Holstein/Environmental Noise Directive in Schleswig-Holstein

Lärmbekämpfung ◽

10.37544/1863-4672-2019-06-10 ◽

2019 ◽

Vol 14 (06) ◽

pp. 184-189

Author(s):

L. Gliesmann ◽

A. Brückner

Keyword(s):

Federal Government ◽

Environmental Noise ◽

Action Plans ◽

Noise Mapping ◽

The Third ◽

Current List

Die dritte Runde der Umgebungslärmrichtlinie 2002/49/EG [1] wird mit der Lärmkartierung 2017 und der aktuellen, in Schleswig-Holstein (SH) noch nicht vollständig abgeschlossenen Aufstellung der Lärmaktionspläne umgesetzt. Die Zuständigkeit für die Ausarbeitung der Lärmkarten und für die Aufstellung der Aktionspläne liegt in SH gemäß § 47 e Bundes-Immissionsschutzgesetz [2] bei den Gemeinden. Dem Land obliegt die Berichterstattung an die Bundesregierung.   The third round of the Environmental Noise Directive 2002/49/ ED [1] will be implemented with noise mapping 2017 and the current list of noise action plans, which has not yet been completed in Schleswig-Holstein (SH). The responsibility for the development of the noise maps and for the preparation of the action plans lies in SH according to § 47 e Federal Immission Control Act [2] in the municipalities. The country is responsible for the reporting to the Federal Government.

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Pemetaan Dan Perhitungan Pemaparan Tingkat Kebisingan Pada Industri Pengolahan Kayu Di Kecamatan Siak, Provinsi Riau

Al-Ard Jurnal Teknik Lingkungan ◽

10.29080/alard.v6i2.1185 ◽

2021 ◽

Vol 6 (2) ◽

pp. 68-76

Author(s):

Aryo Sasmita ◽

Muhammad Reza ◽

Rodesia Mustika Rozi

Keyword(s):

Sound Level ◽

Sound Level Meter ◽

Noise Mapping ◽

Level Meter

Dalam kegiatan operasionalnya CV. X yang bergerak pada pengolahan kayu, berpotensi menimbulkan kebisingan yang berasal dari mesin-mesin yang digunakan dalam proses produksi pallet. Kebisingan di perusahaan ini dapat berpengaruh terhadap kesehatan dan kenyamanan pekerja. Penelitian ini bertujuan untuk mengetahui intensitas kebisingan yang dihasilkan oleh mesin produksi, lama waktu pemaparan, pemetaan kebisingan dan upaya pengendalian kebisingan. Metode pengukuran kebisingan mengacu pada metode noise mapping dan alat yang digunakan adalah Sound Level Meter. Data yang diperoleh kemudian diolah menjadi peta kontur dengan variasi warna biru, hijau, kuning, ungu dan merah. Hasil penelitian menunjukkan tingkat kebisingan tertinggi sebesar 99,4 dB dan tingkat kebisingan terendah sebesar 67,3 dB. Berdasarkan hasil perhitungan menggunakan persamaan NIOSH dari 128 titik pengukuran metode noise mapping terdapat 38 titik dengan tingkat kebisingan >85 dB yang menunjukkan waktu pemaparan di atas standar yang sudah direkomendasikan NIOSH. Tingkat kebisingan tertinggi sebesar 99,4 dB dengan lama pemaparan selama 0,3 jam dan tingkat kebisingan terendah sebesar 67,3 dB dengan lama pemaparan selama 475 jam. Upaya pengendalian yang dapat dilakukan untuk mengurangi kebisingan seperti pengendalian dari sumber, jalur transmisi, dan penerima.

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