SO: DD-1

Many speakers that we use for CD’s and cassettes vibrate pieces of paper to make voices and music. You can take a speaker apart and see this paper. The speaker vibrates this paper in very specific patterns By doing this just right, the speaker paper can create voices and music exactly as they were recorded.

We vibrate vocal cords of skin to speak. These are located near the top of our throat inside the Adam’s apple. They are near the bump of the larynx.

Birds use their syrinx for sound vibrations. It’s located deep in their throat at the junction where the two tubes form their lungs meet the trachea.

Two air tunnels– the bronchi– in birds come upward from the bird’s multi-air sack lungs. Te syrinx of a bird is located where the two bronchi join the trachea>(Research if you need to.)

The four bronchi tube-tunnels which come from the bird’s lungs have skin-like membranes in them that muscles move in and out of the air flow so they’ll vibrate

Sometimes there is something like a balloon–the osseous bulla– attached to the syrinx in a bird’s chest which make sounds like the honking of geese.

Oftentimes these membrane in the bronchi tunnels of a birds airways are attached to super-speed muscles–the fastest on earth. These are also used for a rattlesnake’s rattle-shaking and a trout’s swim bladder.

The super-speed muscles of the syrinx can pump out 400 contractions per second and produce the trills and rapid sound changes you hear in some bird calls.

Super-speed muscles make it so birds can make bird songs that make the fast notes that you hear in some bird songs. These sounds can be crazy fast-changing hundreds of times a second!

Some birds can make as many notes as there are on a piano in the time it takes you to blink your eyes twice!

Birds can make two different sounds at the same time. Just as a piano player’s two hands can be playing two different sounds at the same time, even so many bird songs are combinations of two sound melodies. Many bird songs are complex duets between both sides of their trachea!

Birds can also expand and contract different parts of their throats and use one or more parts of their lung air sacs.

Manipulating their throats and air sacks produces wild and beautiful overtones and whistles which add to their calls. This is how many jungle birds make their incredible sounds!

We beat drums, blow whistles and talk into kazoos to make noises. Besides bird calls coming from their throats, birds also use their feathers, beaks, wings and feet to make sounds. These sounds are called srutifications.

The red-capped manakin does a hysterically funny bird dance.

Snapping sounds like ones the grouse makes are thought to be caused by miniature sonic booms like jets make only it’s done by parts of the feathers moving at over 900 miles per hour.

The penguin manakin lifts its wings over its head and vibrates them over 150 times a second!

The club-winged bird’s feathers work together like a spoon clacking on a washboard.

The white stork throws its head back and clatters its beak like a dancer with a pair of drums.

One of the strangest sonations is the machine gun sound the brown sicklebill bird of paradise makes with its wings. In World War II, Japanese soldiers were crossing Indonesia. When they got to where these birds lived, the birds began firing away. The soldiers started diving for cover. The natives guiding them had a good laugh.

List 2 summaries of the devotional parts in this article and give a different personal application to each.