• Human hearing
  Humans with normal hearing can typically hear sounds between 20 Hz and 20,000 Hz, but this range decreases with age.
  Infrasound and ultrasound
  Sounds below 20 Hz are called infrasound, and sounds above 20,000 Hz are called ultrasound. Elephants use infrasound to communicate over long distance

12/16/2024

Parabolic Horns driver how it works

Parabolic Horns

Bass Horns

tangband drivers

All about horn speaker design-11

https://www.youtube.com/watch?v=hpA_hFVwFqY

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Subwoofers, Woofers, and Tweeters as Fast As Possible

https://www.youtube.com/watch?v=jhvXWpRmhvM

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How Speakers Make Sound

https://www.youtube.com/watch?v=RxdFP31QYAg

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Sound Cannon activated by Artificial Intelligence

https://community.dfrobot.com/makelog-313015.html

4:24 / 5:42

twitter 2000-20,000hz, smalest 

woofers 2--2,000 hz biger

sub woofers 20-200hz

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How A Horn Speaker Works - Exciting Horn Experiments!

https://www.youtube.com/watch?v=zVT4PrXJlbU

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Horn vs regular speaker

https://www.youtube.com/watch?v=sIOzwyJzUc4

12/12

Thank you for your phone call. Here are some notes: a similar technology is applied to narrow the sound beam and extend its travel distance.

long-range acoustic device (LRAD)

1._ ..amazon.com Device

1000x Powerful Plug-in Ultrasonic Mouse and Rodent Deterrent for Buildings, Garages, Attics and More. Works with All Rodents. Ultrasonic Rodent Repeller, Band

Visit the MouseBlocker Store

4.0 4.0 out of 5 stars    308 ratings

700+ bought in past month

$189.95

2._ ..Microchip Chip

Ultrasonic Frequency Generator IC

https://myskunkworks.net/index.php?route=product/product&product_id=56

Ultrasonic Frequency Generator IC.\par

Price: $9.95\par

New Microchip programmed with 3 different ULTRASONIC frequencies. Made for use with Ultrasonic transducers and other high frequency transducers.\par

Outputs Three SINGLE Frequencies. This is different from our Sweep frequency IC.\par

1. 20 kHz\par

2. 22.5 kHz\par

3. 25 kHz\par

Use it to drive an audio power amp, or IRF530 mosfet, or a darlington driver like ULN2803 or ULN2074 to amplify the signal. Great for experimenting with PHASOR pain field generators, dog training, etc.\par

3._ ..// South Korea Corp

Long Range Acoustic Hailing Device?

It is a high powered Aoustic Hailing Device for long distances that can be used manually. Bluetooth and external USB memory are supported. MP3 file playback and microphone broadcasting are also available.

https://www.eltem.net/wp/propa-1000p-eng/

3._..// USA

LRAD is the global leader and de facto standard of Acoustic Hailing Devices (AHDs).

https://genasys.com/lrad-products/

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spectrum analyzer above gives us a graph of all the frequencies that are present in a sound recording at a given time

https://academo.org/demos/spectrum-analyzer/

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Spectral analyzer of Signals

https://www.dcode.fr/spectral-analysis

.

The FREE Spectrum Analyzer You Should Know About - SPAN by Voxengo

https://www.youtube.com/watch?v=6w1oNMEcDVQ

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https://en.wikipedia.org/wiki/Sonic_weapon

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https://medicalxpress.com/news/2024-08-ultrasound-device-chronic-pain.html

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https://www.facebook.com/Alphajammer/posts/phasor-pain-field-generator-rc-high-power-8-transducers-focus-tubes-product-desc/271922613504378/

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https://www.electro-tech-online.com/threads/wringing-pain-field-generator-att-audioguru.29474/

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https://myskunkworks.net/index.php?route=product/product&product_id=56

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11/11/2024 Monday

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Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure or incapacitate an opponent

https://en.wikipedia.org/wiki/Sonic_weapon

https://groups.google.com/g/sci.electronics/c/POKiDwA3o0o?pli=1

https://medicalxpress.com/news/2024-08-ultrasound-device-chronic-pain.html

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Phasor Pain Field Generator & RC, High Power (8 Transducers + Focus Tubes)

Product Description

Third Generation Higher Powered Ultrasound Pain Field Generator

For Home, Property, and Personal Protection. With Radio Control, Special Issue Transducers and Focus Tubes for Long Range Concentrated Effect

This item is assembled and ready to use.

It is also available as a kit with plans and all parts, requiring assembly.

Or as plans (paper or downloadable versions), with parts and assembly required.

https://www.facebook.com/Alphajammer/posts/phasor-pain-field-generator-rc-high-power-8-transducers-focus-tubes-product-desc/271922613504378/

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Electronics Forums Electronic Projects Design/Ideas/Reviews 

Wringing Pain Field Generator att:Audioguru

https://www.electro-tech-online.com/threads/wringing-pain-field-generator-att-audioguru.29474/

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Ultrasonic Frequency Generator IC

https://myskunkworks.net/index.php?route=product/product&product_id=56

Ultrasonic Frequency Generator IC.\par

Price: $9.95\par

New Microchip programmed with 3 different ULTRASONIC frequencies. Made for use with Ultrasonic

 transducers and other high frequency transducers.\par

Outputs Three SINGLE Frequencies. This is different from our Sweep frequency IC.\par

\par

1. 20 kHz\par

2. 22.5 kHz\par

3. 25 kHz\par

Use it to drive an audio power amp, or IRF530 mosfet, or a darlington driver like ULN2803 or

 ULN2074 to amplify the signal. Great for experimenting with PHASOR pain field generators, dog training, etc.\par

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https://www.usspeaker.com/

HORN...

https://www.usspeaker.com/