Based on the answers provided, here are the corrections needed for the 3D object:

1. Modify the overall shape of the object to resemble a whistle. This could involve streamlining the shape and adding a hole for blowing air through.
2. Relocate the rectangular block to the top center of the cylinder instead of its current lateral position.
3. Adjust the size of the rectangular block to ensure it is very short and its length exceeds the diameter of the cylinder. This may require some trial and error to get the proportions right without specific measurements.