The prototype shown in the videro is known as a Type 1 toroidal whistle or Ultrawhistle. It is represented by US Patent 4429656. The Dynawhistle is the inverted, horn loaded Type 2 version that followed. It is represented by US Patent 4686928. The inverted Dynawhistle uses 25% less air consumption and due to horn loading is 10 dB louder on axis than the Ultrawhistle for a given frequency. Both can be designed for a wide range of frequencies.
Enjoyed the video. American Signal currently builds the largest and loudest warning sirens. I approached them about my Dynawhistle years ago, which could replace up to three of their largest T-135 units. Maybe that's why they lost interest-less units to sell to cover a given area.
What does ACA mean? Isn't it the same thing as ACS?
UBConquered 2 months ago
The prototype shown in the videro is known as a Type 1 toroidal whistle or Ultrawhistle. It is represented by US Patent 4429656. The Dynawhistle is the inverted, horn loaded Type 2 version that followed. It is represented by US Patent 4686928. The inverted Dynawhistle uses 25% less air consumption and due to horn loading is 10 dB louder on axis than the Ultrawhistle for a given frequency. Both can be designed for a wide range of frequencies.
acoustics101 2 months ago
Great job!
alrui 4 months ago
Enjoyed the video. American Signal currently builds the largest and loudest warning sirens. I approached them about my Dynawhistle years ago, which could replace up to three of their largest T-135 units. Maybe that's why they lost interest-less units to sell to cover a given area.
acoustics101 4 months ago
@acoustics101 How low a frequency is your Dynawhistle?
Can you change its frequency to give out a unique warning?
robertgift 2 months ago
*ASC
*T-128
Thewoog34 5 months ago
sorry no I asked and they said they are useing thoes for there musiem
FSThunderboltfan1000 5 months ago
are any for sale? the old ones, like screamer or hurricane.
shorttman1968 5 months ago
Boy those t-128s look familiar and those crazy large/heavy boxes
dirtracer4life63 6 months ago
yes they are making a siren museum there and towns are donating there old sirens there
FSThunderboltfan1000 6 months ago
Do you know if they have plans on putting the Hurricane into use?
HyperFlameGuy 6 months ago