SO: DD-3 (First Timers)

The loudest bats use sonar as loud as the Space Shuttle.

To protect themselves from going deaf by their own sounds, bats separate the bones of their inner ear as they make each sonar blast.

The stirrup bone (which looks like a horse’s stirrup) is connected to the cochlea.

Bats can send out two different types of frequencies. Scientists call one “FM” and the other “ZF”.

In bats’ FM sonar, the blast contains only one frequency (pitch) of ultrasound wave. This is often used when the bats are looking over a large open area for insects

To remember that FM frequencies are used for the capture of bugs and the close situations, use the memory trick that F can stand for Fast. When the bat needs to make Fast moves, it uses FM waves.

The big brown bat has a fat cochlea.

The fat-ness of the bat cochlea helps the Big Brown Bat to detect its own high-frequency sonar from many other bat’s sonar sounds.

The FM blast of sound consists of a single sound.

FM sonar works perfectly for bats hunting in crowded situations like when thousands of bats encounter a swarm of insects and begin quickly flying close to each another.

Bats’ brains can understand ultra-sound echoes incredibly fast! (in 2 to 3 millionths of a second.)

Being able to understand what their echoed sound is telling them very slowly is ok for the bats to not crash into one another.

Scientists discovered that some bats can change the shape of their ears in a tenth of a second.

Bats’ strange, spooky-looking ears have what are called ear leaves. These help hearing the returning echoes of their sonar.

Bats don’t mind it being crowded on cave ceilings

Ribbing in some bats’ ears helps channel the sound down their ears.

The tendons in a bat’s foot are arranged in such a way that a bat is relaxed when their foot grabs what it is holding onto.

Hanging from cave ceilings makes it easy for a quick escape if a predator reaches the bats.

The biceps muscle is very important for bats. This muscle can disengage the ear so the ear is not damaged with its loud sonar.

The “front” of the bat cochlea is wide. High sounds are heard in this wide outer coil of the cochlea.

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