Sound Energy Approach in The Use of LRAD as A Bird Deterrent Device in Sam Ratulangi Manado International Airport, North Sulawesi, Indonesia

Basuki, Budhy; Palupi, Maharani Ratna

doi:10.1088/1757-899x/943/1/012053

Cited by 3 publications

(3 citation statements)

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“…These studies require artificially controllable high-intensity low-frequency acoustic sources as acoustic sources. In addition, the high-intensity low-frequency acoustic source can be used for boiler ash removal [5], airport bird repelling [6], etc. Although many brands and performance speakers have been used in production and life, it is mainly to achieve medium and high-frequency acoustic wave generation.…”

Section: Introductionmentioning

confidence: 99%

A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator

Zhang,

Dong,

et al. 2024

PLoS ONE

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The high-intensity low-frequency acoustic sources have essential applications in acoustic biological effects research, airport bird repelling, and boiler ash removal. However, generating high-intensity low-frequency acoustic waves in open space is difficult. In this paper, a low-frequency acoustic generator with a resonant cavity used to enhance the acoustic intensity in open space was developed, which is an aerodynamic acoustic generator to radiates a high-intensity acoustic wave of 52Hz. Some experiments were carried out to measure this generator’s internal flow field and radiated acoustic field characteristics, including the propagation characteristics at 100m. The experimental results show that the resonant enhancement effect is presented near the predetermined resonance frequency, and the enhanced value is about 4dB. The acoustic intensity for 52Hz at 1m position is 124dB. By combining the Helmholtz resonator with the airflow modulator, the airflow resonance in the resonator enhances the air pressure pulsation inside the chamber and increases the disturbance of acoustic radiation to the air. So as to improve the sound intensity and radiation efficiency in the low-frequency range.

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Section: Introductionmentioning

confidence: 99%

A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator

Zhang,

Dong,

et al. 2024

PLoS ONE

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“…The low-frequency aerodynamic high-intensity acoustic source is a kind of airflow-modulated acoustic wave generator. Low-frequency aerodynamic high-intensity acoustic sources can be used for boiler ash removal, 2 airport bird repelling, 3 biological effect experiments, 4 etc.…”

Section: Introductionmentioning

confidence: 99%

Theoretical research on the application of impedance calculation in the design of high-intensity low-frequency acoustic generator

Zhang,

Dong,

Liang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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The impedance matching is essential in producing high-intensity acoustic waves. This paper studies the impedance calculation methods of modulators and double-chamber Helmholtz resonators based on fluid mechanics, aeroacoustics, and electro-acoustic analogy principles. The results: ① The impedance expression of the resonators is derived. ② The impedance variation law of the chamber volume, the stator size, the air supply pressure, the air supply flow, and the working frequency is calculated. ③ The impedance-matching design scheme of the two-chamber Helmholtz low frequency and high acoustic intensity generator is given. Based on the experimental results of the high acoustic intensity generating device that the author has manufactured in the closed space, the correctness of the impedance calculation and matching design scheme in this paper is verified. This method has guiding significance for the design of high-intensity acoustic generating devices in confined space.

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“…Nonetheless, there is one acoustical approach superficially explored by mimicking an exact frequency wave pressure of mosquitoes to control them in a particular area (Pantoja-Sánchez et al, 2019). In parallel to hominid application, the acoustical approach or to be exact the use of a long-range acoustic device (LRAD) was proven to disperse uncontrolled mop, sea pirates and others (Basuki & Palupi, 2020). The study hinted that the important keys to this acoustical approach are an exact frequency level of continual emission (Lubner et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Hearing Range Analysis of Rattus Argentiventer the Paddy Field Pest

Abd Rahim,

Huah,

Arsat

2023

Adv Agric Food Res J

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Rice is the second most-grown cereal crop and one of the important staple foods in Malaysia. Seasonal rodent attacks from a family of Rattus argentiventer have shortened rice production by up to 80%. Yet, the acoustical method in controlling rodent populations is one of the topics that have not been properly explored. Under the field study radius, this study aims to analyse the hearing range of R. argentiventer under a controlled environment. Knowing a rodent’s ability to hear is essential for evaluating whether human activities, especially in terms of noise pollution, have an impact on hearing and consequently on rodent behaviour. Thirteen subjects were randomly cage-caught in the paddy field and were tested in a reward-based go/no-go procedure. Fully trained subjects were observed after acoustically exposing the subjects to a 10 kHz of pure tone less than 60 dB SPL for 25 sessions. Hearing range analysis commenced by revealing a pure tone to the fully trained subjects at low (1 kHz – 5 kHz), median (10 kHz – 40 kHz) and high (45 kHz – 80 kHz) frequencies. The results showed the subjects have sensitive frequencies at 5 kHz for low frequency, the median frequency at 25 kHz and high frequency at 45 kHz. From the sensitivity hearing results, it can be indicated that the hearing range of R. argentiventer is between 1 kHz to 55 kHz at sound levels of 60 dB. The results responded to the lack of timely response which is within an average of 5 sec and the minimum licking period at an average of 13 sec as the inaudible cut-off hearing range.

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Sound Energy Approach in The Use of LRAD as A Bird Deterrent Device in Sam Ratulangi Manado International Airport, North Sulawesi, Indonesia

Cited by 3 publications

References 0 publications

A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator

A high-intensity low-frequency acoustic generator based on the Helmholtz resonator and airflow modulator

Theoretical research on the application of impedance calculation in the design of high-intensity low-frequency acoustic generator

Hearing Range Analysis of Rattus Argentiventer the Paddy Field Pest

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