Phone Amplifier

At first, I drew a slot using the Slot tool under the create menu on Fusion 360. Then I extruded the slot to 40 mm.

I did all of the phone amplifier’s measurements based on my phone measurements, which are: depth (the thickness of the phone): 8.5 mm, height:158.1mm, and width:73.8mm. My next step was to draw a slot (using the center to center slot tool) on to the top part of my shape. The height of the slot is 12 mm and the width is 75 mm.

then I clicked on the slot I just drew and extruded it towards the inside part of the shape, making then a hole on the shape. On the extrude window on the right side of the screen, I changed the distance to -35 mm and the angle to -7 degrees to make it into a pyramid shape.

Since I only have one speaker on the right side of my phone, I drew a 20 mm radius circle on the front side of my shape.

After that, I clicked on the circle and extruded it outwards. I set up the distance to 25 mm and the angle to 30 degrees to make a shape similar to a cone at the exit of the sound.

Consequently, I created a square on the side of the shape I just extruded. After I drew the square I extruded it to cut a piece of the shape that was trespassing the bottom line of the speaker.

At next, I created a hole on the cone looking shape I just extruded by clicking the “h” key or it can be found under the create menu. The dimensions for the hole are: the angle is 55 degrees, the length is 1 mm and the diameter of the circle is 33 mm as it is in the picture below.

Then I created another hole on the highlighted surface in the picture, but this time facing towards the inside of the speaker. The intention was to connect this hole with the tiny entrance created in the third step, (the spot to place my phone in), amplifying then the sound that travels through both holes.

My last step was to smooth all the surfaces of my design and make it rounder by using the fillet tool that can be used by clicking the “F” key or it can be found under the create menu.

This design was created as part of the University of New Hampshire’s ET401 “Introduction to 3D printing ” course. You can find design plans for this projects and many others at


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