# Hit with mallet to one side clamped metal triangular plate

1. Jun 7, 2017

### Mustafa Umut

1. The problem statement, all variables and given/known data
I want to build a musical instrument for homework . I want to cut triangular metal plate where triangle will stand vertical to ground , bottom of triangle is 1 inch wide and clamped , triangle height is 42 inches.

Does that triangle produce different notes when hitting from bottom to up , different locations or does it produce the same sound everywhere ?

2. Relevant equations
too much complicated

3. The attempt at a solution

2. Jun 7, 2017

### Voltageisntreal

Consider that no two sounds are actually the exact same- so every time you hit the plate: from a physics point of view; it will produce a different sound although you as a person may not be able to distinguish the difference.

What constitutes a certain sound? What determines pitch when hearing the sound?

3. Jun 7, 2017

### haruspex

The plate will have a number of vibrational modes, each with its own frequency. The frequencies and the distribution of energy between them will be largely dictated by the shape (and the mix may or may not be harmonious), but the balance will also be influenced by where the plate is struck.
I read that drum skins have to be "tuned", i.e. tightened in a way which ensures the drum produces almost the same sound regardless of where it is struck.