This is admittedly a silly project but I have some time to spare.
My goal is to use PVC pipes in creating a lung powered air horn as a "noise maker" for some squadron parties and ceremonies. I've seen all kinds of DIY versions with different types of diaphragms. I have some horn lenses lying around and would like to implement those into the design but I don't remember their cutoff frequency. Let's say 1400 hz.
So, to make this as efficient as possible, from the input side/mouth of the tube to the throat of the horn lens, how long should the tubing be for a roughly 1400 hz "horn"? I'm not too worried about the diameter since the horn lens is a 1" throat. I know the wavelength is roughly 10" but I don't know what kind of interaction that would have with the horn lens.
I'm also considering using an old compression driver as the diaphragm for this; just bore out a big enough hole for a mouthpiece on the backside then mount the horn lens.
My goal is to use PVC pipes in creating a lung powered air horn as a "noise maker" for some squadron parties and ceremonies. I've seen all kinds of DIY versions with different types of diaphragms. I have some horn lenses lying around and would like to implement those into the design but I don't remember their cutoff frequency. Let's say 1400 hz.
So, to make this as efficient as possible, from the input side/mouth of the tube to the throat of the horn lens, how long should the tubing be for a roughly 1400 hz "horn"? I'm not too worried about the diameter since the horn lens is a 1" throat. I know the wavelength is roughly 10" but I don't know what kind of interaction that would have with the horn lens.
I'm also considering using an old compression driver as the diaphragm for this; just bore out a big enough hole for a mouthpiece on the backside then mount the horn lens.
Could probably use a Trombone / Bugle mouthpiece as well
but would need to match the diameter of a mouth piece.
likely candidate is also just a Bugle
they have all plastic student models for about 40 bucks.
Length of tube, believe you could just use a Fundamental Frequency calculator
related to whatever higher harmonic your shooting for.
far as I would know / guess
but would need to match the diameter of a mouth piece.
likely candidate is also just a Bugle
they have all plastic student models for about 40 bucks.
Length of tube, believe you could just use a Fundamental Frequency calculator
related to whatever higher harmonic your shooting for.
far as I would know / guess
