Making whistles and seeing what decibels they produce

 Making whistles and seeing what decibels they produce

Knowing what has to be created or changed, to create those higher decibels.

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Extra: Creating the hardest decibels with the least airblow

Interesting for whistles and whistle making

Making whistles and seeing what frequencies and frequency peaks they produce with an acoustic spectrum analyser.

Knowing what has to be created or changed, to create those frequencies.

And also creating infrasound and ultrasound whistles with certain frequencies.

Leverage training with a shovel and sand

Leverage training with a shovel and sand.

Putting the shovel into sand and lifting it up, and holding the shovel while the sand is still on the shovel.

-More sand is harder

-Further away from the shovel blade and sand is harder

Researching if constant black and white screens are better for developing night vission

Notes:

Researching if constant black and white screens are better for developing night vission.

It's said less colours for night vission. Certain eye cells. At night less to near no colour visable.

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Software.

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Also for:

Extreme night devission(s).

Or preperation.

And or keeping night vission or preparing for slight better night vission..

Better data storage update

For data storage, hardware. 

More data capicity

Smaller

Faster workings

-Faster writings

-Faster readings

Less electricity use

Longer lasting

More resistant against falling and resistant against electromagnetic pulses and more.

And also maybe more different methods to safe data. 

Something else then the current magnetic storage. Or another form of magnetic storage.

A compound ballista

A compound ballista.

-With turning parts and rope multiple times around.

And a very big one.

Maybe with a turning wheel, to span it.

A spring steel ballista

A spring steel ballista.

And also a very big one.

Warning: Can be dangerous.