Speaker Design

Sunday, May 23, 2010

1.1

1.1 Environmental hazards are identified in relation to the task.MDF is full of Formaldehyde which can be harmful to humans and the environment. It can cause headaches, watery eyes and eventually cancer. MDF also releases other toxins into the environment. In some countries, such as Australia, wood from native forests is used to make the chips that go into MDF. This is a danger to the environment as native forests are becoming rarer and rarer. Luckily a lot of MDF manufacturers are beginning to use recycled materials, such as straw and bamboo, as sustainable alternatives to native wood.

Sunday, May 16, 2010

Bracig Notes

Bracing is an acoustic treatment of the box. It allows the box to stop the flexing waves forms that are reproduced inside it. The port is the 'interface' between the box and the outside. It counterbalances the moving of the voice coil by pushing out when the coil is moving in (through magnetism) and vice versa.

Carpet Underlay notes

Carpet underlay is an absorber of unwanted frequencies inside the box. Low frequencies inside the box bounce of the wall of the box, hitting other frequencies that need to be reproduced, cancelling out the bass. The speakers sound tinny. The carpet underlay absorbs any unwanted frequencies.

Standing Waves notes

Standing waves are wave forms that 'stand' on the edge of the front plate, lingering around not dispersing properly. As they linger they interfere with other waveforms coming through, cancelling out waves that you want to reproduce. It produces a baseless speaker response.This is easily fixed by rounding the edges of the front plate. The standing waves will disperse outwards as they hit the edge, stopping any wave cancellation.

Tools List

TOOLS LIST

Hand Drill
Drill Press
Palm Sander
Belt Sander
Circle Cutter
Soldering Iron
Rasp
Scissors
Mallet
Wire Stripper
Cutters
Pliers
Drill pieces
CAM Machine
Soldering Iron