Process Sound through materials#

Spiral coil
Spiral to lasercuted fabric
Laser cut files spiral speaker .pdf + .dxf

Retro-ingeneering part#

I believe what I can see or feeling. I need an autopsy of different devices, to learn from them. To make an object with a kind of smartness, I needed to know how the smartness is working. And then I can produce with this knowledge, an object from the smallest scale as possible to the bigest scale as possible. In this course I can start from the microcontoler and the circuits to the dissemination plan.

Something who amplify the sound : Lexon Mini hacked#

Lexon Mini Opened Board DataSheet Link Cost
Bluetooth + micro +
speaker + lipo battery 3,7V + cable + foam Amazon 29€

Something who make sound and very thin : an hearphone#

Hearphone Back Opened Coil Trough Microscope 8Omh Standard speaker
A coil speaker in Microscope#
To see the membrane#

Something who make power#

I like to know how I can make a global design from sustainability tools, objects and products. So I’m very interested about power. I think It’s the futur, our futur for designer, how can we make autonomus object. Also the solar pael are like treasure, like ittle jewellery !

Solar panel 1 Solar panel 2 Solar panel 3
The light The device the battery the LED the device Cost
5 € from Leroy merlin

A radio#

Sony Observations
plastic device are inside the boxe, I can take different component from there. The coil is the same than other sound device for the membrane.
Conclusion :#

this way to opened different device is very interesting part beacause we can see the cheaply device inside and see how we could make it. But the industrial process is bigger than our fablab…

Sound#

caracter of the sound Goals and Interests
frequency a way to communicate with our own body, a way to care of our energy with meditation protocols
music to listen music every day at every moment : in the transport to have more energy to go to work, alone, with friends or at home. As a kind of identity powerfull caracter. To be with a community.
vibration bone conductor is more than bones possibility of use is also a multi surface conductor
conclusion My final conclusion is that the spiral coil work as a speaker, the bone conductor work as a hearphone device and a speaker device
Research and Result

Test To know which device work better than an other#

For my tests I take the protoboard with the OpAmp and tested different materials to involve the efficiency of each piece.

Magnets Speakers

Fabric hearphone / speaker#

Elements Different structures 3D structures and conductive thread
1 2 3
Speaker thread Crochet speaker Copper thread Coil copper shield speaker Gold coil speaker
take the picture
test all the spiral coil quality with an Amp device from protoboard#
Protocol Amp with mosfet Tip 120 + sound oscillator signal + 3.5V
I change the output signal with each spiral coil, I use a neodymium magnet (diameter 12mm, 0,6mm tickness)
Mesure the power of magnet field#
Industrial device Magnet worth process : a wood support, same place from smartphone, app, unit : uF decibel
Speaker 8 Ohm 2,5W 4500 uF 70 db (change with the frequency : Hight frequency=low db)
Speaker 8 Ohm 0,25W 300 uF max 76 db
Speaker 8 Ohm 10W 4000 uF max 70 db
Speaker 4 Ohm 0,3W 2300 uF max 70 db
Magnet 8 Ohm alone 98 uF x
Device circle 4 cm field uF alone on silk membrane field uF with magnet 15 mm x 1 mm field with ring magnet Décibel with Tip120 Amp and magnet 15 mm x 1 mm
bobine and membrane from speaker 8 Ohm x 140 uF x 44db
bobine from speaker 8 Ohm 90uF xx xx xx
tissé 50 uF 140 uF 166 uF xx
crochet chain 51 uF 138 uF 120 uF 42 db
lasercut copper shield spiral 58 uF 175 u F 112uF/140 uF 32 db
gold spiral 48uF 140 uF 130/157 uF xx
carl grim fabric spiral xx 35 uF 110 uF xx

Nota Bene The Amp device does not change the sound. The quality of the sound depends to differents parameters like : the Hall Effect from the magnet. The indication is in uF from the app is in uF : because . - source :

Add the sheet with the differences of the different speakers.

Output device for sound : Spiral coil Files from parametric design#

Design a flate spiral coil Make the file to insulate the + trace from the center the whole circle structure file for flat spiral saved with .dwg
Thread structure with notch thread simple structure lasercuted spiral coil with the circuit in one piece

The design of the spiral coil can be find with an online calculator :#

Coil32 Circuits
depends for the uF and the center of the coil to find the sizes parameters depends of the number of turns and the center diameter to find the uF
Formulation of Flat spiral explication from www.circuits.dk
L (uH) = r^2 * A^2 / (30A -11 Di) / A= (Di+N*(w+s))/2 Di =inner diameter in inches. / s =distance between windings in inches. / w =wire diameter in inches. / N = number of turns. / Do =outer diameter. / 1 inch = 0,0254m=2,54cm = 25,4mm.
shape shematic and exemples shematic of the electromagnetic shield

Conclusion : My Flat spiral coil is a 100 uF value.

Output with bones conductor from adafruit#

An adafruit opened bones conductors…#

If this device could change different material and we could change all material or object in speakers. This observations as a designer interest me. It’s maybe a new thing that it can change our daily gestures and mouvements… I’m very interested about it, like how we can ear a sound from our bones or from a plant !!

A module with a bone conductor device To wear

test with a porcelaine shape as a passive amp#

The interest of the bones conductor is that I could put on/in differents material/shape, like daily object to make sound. Or listen sound through plants… I can imagine that my device could amplify the input audio signal and the output could be the bones, but also every material around us.

Membrane Module#

Membrane from different device#
8 Ohm speaker Hearphone Lexon mini speaker opened

Change and switch for different materiality products. It that means, change material, for design sustainability development goals. * with recycled materials : silk or other fabric from second hand shops/stock/recycleindustry * with bio material : from wastes, from

Membrane with silk second hand garment wastes#

As my interest in circular and sustainable protocol, I have tried to work on this problematic. I used to go there and there to buy my clothes, and often I found old silk garment. I would like to re-use it.

Silk membrane with coil from 8Ohm speaker With the copper coil

Membrane with silk paper#

The thin membrane is a technical details in order to have the best sound quality. I have tried different things and the best one at this moment is the silk paper. So for a test I try to make a spiral coil membrane with a paper silk circle and a copper shield spiral.

Basic V.2 shape Fusion design coil parameters Insulated the trace from the center of the coil I created a new module like an added skin layer

I use to save the trace for lasercutting in .dwg and opened the files in illustrator to change it with a pdf extension. The added layer is 3D printed with Cura.

video Z axe silk paper test#

Result

Video with the copper spiral flat coil on silk paper membrane#

Silk can be changed with an other material, I have make a mold (TPU 3D printed) to cast thin bioplastic sheet.