Helmholtz in the kitchen: a frying pan as a volume resonator

Darmendrail, Luis

doi:10.1088/1361-6404/ab6fba

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…As a perspective for future work, we also think that this contribution provides a further example of how the availability and mobility of smartphones (or tablets) allows to investigate sound and oscillation phenomena in particular in everyday life settings. Other examples of this kind are bouncing balls [20], measurement of sound velocity [21], architectural acoustics [17,22], elevator oscillations [23], cracking knuckles [24], tunnel pressure waves [25], the Helmholtz resonator [26], the human vocal tract [27,28], and musical acoustics [29,30]. For further exploration by the interested reader, inspiring activity collections including acoustics and other areas of physics are available (e.g.…”

Section: Discussionmentioning

confidence: 99%

The Euler disk and its dynamic finite time singularity: Investigating a fascinating acoustical and mechanical phenomenon with simple means

Darmendrail

Müller

2021

Acoust. Sci. & Tech.

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Many have spun a coin or other disk on a table, observing -and listening! -thatwhile its motion comes to rest, the angular velocity of the contact point and the frequency of the emitted sound raise in a striking way. This dynamical system is known as the ''Euler disk,'' and its physics is theoretically understood as a ''finite time singularity'' in form of an inverse power law. Various dissipation mechanisms lead to different exponents in the power law. The present investigation is about different configurations of the Euler disk using acoustical and mechanical data. We present results for the well-known Euler disk toy, well in accord with a model of viscous air dissipation. This is the first measurement using the acoustical signal for the dynamics of the Euler disk. Moreover, we present new cases where other dissipation mechanism must be dominant. Experiments are carried out with simple means and using a smartphone for recording and analysing data. This and interesting physics of the Euler disc make it a good candidate e.g. for undergraduate lab-work courses or research projects, which can spark students interest in acoustics, and more generally in applying physics to phenomena of everyday life.

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Section: Discussionmentioning

confidence: 99%

The Euler disk and its dynamic finite time singularity: Investigating a fascinating acoustical and mechanical phenomenon with simple means

Darmendrail

Müller

2021

Acoust. Sci. & Tech.

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“…This is shown by the fact, that more than 41 000 papers with Helmholtz resonators in the title can be found in Google scholar, among them 18 000 titles since the year 2000. Helmholtz resonators can serve very well for demonstrating resonance phenomena [10][11][12][13][14]. Today, Helmholtz resonators are of special interest in connection with acoustic metamaterials, a growing class of artificial material that manipulate waves [15].…”

Section: Introductionmentioning

confidence: 99%

Helmholtz resonators with more than one opening

Dosch¹,

Hauck²

2021

Eur. J. Phys.

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Helmholtz resonances have been investigated extensively and are still of scientific interest, they are also commonly used in the field of physics education. In this paper, we investigate for the first time systematically resonators with several openings and compare our results with theories taking into account radiative interactions. The presented experiments and possible extensions of them are well suited for classroom demonstrations and student projects.

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Side window buffeting: a smartphone investigation on a car trip

Hirth¹,

M̈ller²,

Kühn³

2021

Eur. J. Phys.

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Movement of air over a hole or cavity typically generates sound, which can have both noisy and tonal components (cavity noise, cavity tones). Such acoustic phenomena often tend to be a nuisance, e.g. for ‘buffeting’ or ‘wind throbbing’ noise, where airflow over an open side window or sunroof in a moving vehicle can produce low-frequency, high-amplitude ‘booming’ sound signals. The present contribution provides a first description of this curious phenomenon of everyday physics at an intermediate difficulty level, comparing a simplified theoretical model based on a Helmholtz resonator with experimental data obtained by everyday mobile IT devices—namely smartphones or tablet PC. Readers thus are able to reproduce and study the buffeting frequency of a car interior, based on relatively inexpensive equipment using their own mobile devices for data acquisition and analysis.

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Helmholtz in the kitchen: a frying pan as a volume resonator

Cited by 4 publications

References 15 publications

The Euler disk and its dynamic finite time singularity: Investigating a fascinating acoustical and mechanical phenomenon with simple means

The Euler disk and its dynamic finite time singularity: Investigating a fascinating acoustical and mechanical phenomenon with simple means

Helmholtz resonators with more than one opening

Side window buffeting: a smartphone investigation on a car trip

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