16-Apr-2025
Your cells can hear
Uncovering the relationship between life and #sound

There's a sensation that you experience -- near a plane taking off or a speaker bank at a concert -- from a sound so total that you feel it in your very being. When this happens, not only do your brain and ears perceive it, but your cells may also.

https://www.eurekalert.org/news-releases/1080394 #science #perception #hearing #vibration #sensory

Your cells can hear

Kyoto, Japan -- There's a sensation that you experience -- near a plane taking off or a speaker bank at a concert -- from a sound so total that you feel it in your very being. When this happens, not only do your brain and ears perceive it, but your cells may also. Technically speaking, sound is a simple phenomenon, consisting of compressional mechanical waves transmitted through substances, which exists universally in the non-equilibrated material world. Sound is also a vital source of environmental information for living beings, while its capacity to induce physiological responses at the cell level is only just beginning to be understood. Following on previous work from 2018, a team of researchers at Kyoto University have been inspired by research in mechanobiology and body-conducted sound -- the sound environment in body tissues -- indicating that acoustic pressure transmitted by sound may be sufficient to induce cellular responses.

EurekAlert!

A cycloidal pendulum - one suspended from the cusp of an inverted cycloid - is isochronous, meaning its period is constant regardless of the amplitude of the swing. Please find the proof using energy methods: Lagrange's equations (in the images attached to the reply).

Background:
The standard pendulum period of \(2\pi\sqrt{L/g}\) or frequency \(\sqrt{g/L}\) holds only for small oscillations. The frequency becomes smaller as the amplitude grows. If you want to build a pendulum whose frequency is independent of the amplitude, you should hang it from the cusp of a cycloid of a certain size, as shown in the gif. As the string wraps partially around the cycloid, the effect decreases the length of the string in the air, increasing the frequency back up to a constant value.

In more detail:
A cycloid is the path taken by a point on the rim of a rolling wheel. The upside-down cycloid in the gif can be parameterized by \((x, y)=R(\theta-\sin\theta, -1+\cos\theta)\), where \(\theta=0\) corresponds to the cusp. Consider a pendulum of length \(L=4R\) hanging from the cusp, and let \(\alpha\) be the angle the string makes with the vertical, as shown (in the proof).

#Pendulum #Cycloid #Period #Frequency #SHM #TimePeriod #CycloidalPendulum #Lagrange #Cusp #Energy #KineticEnergy #PotentialEnergy #Lagrangian #Length #Math #Maths #Physics #Mechanics #ClassicalMechanics #Amplitude #CircularFrequency #Motion #Vibration #HarmonicMotion #Parameter #ParemeterizedEquation #GoverningEquations #Equation #Equations #DifferentialEquations #Calculus

I’m giving a ‘special talk’ on April 12 (tomorrow) at 14:00 at @clab.tw 科技媒體實驗平台 in Taipei (Taiwan), about “Temporary and Distributed Libraries, active and independent librarianship”, as part of the great Radiotopia event co-organised by the Toolkit of Care project and C-LAB, with artists and activists using radio as a medium and a concept, curated by @shulea2, and coordinated by @stwst_linz (Linz, Austria) and @agenceapo33 (Nantes, France).
https://radiotopia.clab.org.tw/

#antenna #signalprocessing #audioart #binaural #electromagnetic #interference #microphones #audiorecording #radio #radioart #radiowaves #transmissionart #soundfrequency #sound #soundart #soundartist #klangkunst #soundinstallation #soundartinstallation #soundsculpture
#soundscapes #acousticspace #sonicworld #vibration #soundarchive #audiology #soundscience #soundstudies

RADIOTOPIA - SIGNAL+ CAMP @C-LAB

無線電藝術工作營 | 2025.C-LAB | WORKSTATION FORUM LIVE PERFORMANCE

30 jours avant« jusqu’au moment où nous sauterons ensemble » au Klap à Marseille dans le cadre du très beau festival Propagations organisé par GMEM de marseille. Cette pièce de groupe est autant une expérience visuelle, sonore que dansée qui plonge le public dans un bain de résonance énergisante. Avec une équipe haute couture ! #light #experience #geste #saut #jump #community #écoute #resonance #gong #vibration #danse
Mouvements vibratoires

Faire entrer l’oreille, le corps, dans les sonsFaire entrer les sons dans le corps, les oreillesJeux de l’ouïe, des osselets, des colimaçonsS’enfoncer dans les acoustiques sonnantesY rebondir en éc…

POINTS D'OUÏE, PAYSAGES SONORES PARTAGÉS

nada 27 features an intimate immersion into the vibrations of earth, wood, water and wind elements together with metal singing bowls.

balance root, sacral, heart and third eye chakras with powerful natural vibrations in this sculpted electroacoustic improvisation.

deep listening and healing with the elements

https://nexttime.bandcamp.com/album/nada-27-live-stream-14-march-2025

#electroacoustic #meditation #deeplistening #healing #vibration #frequency #elements

nada #27 [live stream 14 march 2025], by Hervé Perez

1 track album

nexTTime