Sunday, January 19, 2014


I've been in the process of designing an experiment that requires precise control over the frequency and amplitude of sound waves and must encompass ultrasonic frequencies, ideally up to 70 kHz. I'm aware that is well outside the range of human hearing and closer to the frequencies used in ultrasonic cleaners. Many bird callers and electronic pest control devices advertise the ability to produce ultrasonic frequencies but it is unclear how much range these speaker possess and if they can be modified for other applications. I have also seen ultrasonic piezoelectric speakers that advertise frequencies up to 70kHz but I am uncertain, again, how limited their range is. Ebay is full of signal generators that can produce sine waves of almost any frequency but I believe these still require a transducer to convert the signal and are probably replaceable by various computer programs.

So this is my question: can anyone with a background in sound engineering or alike recommend a minimally expensive, maximally accurate system to produce pure tones of a precise frequency and amplitude (as well as ultrasound more generally) and a speaker to transmit them?


Luke said...

Plasma Speaker(s) most closely fill all of those criteria, if you don't mind building one. Good summary here:

Ickamus said...

I've found that you can create a similar effect with a small guitar amplifier by plugging one quarter inch cable all the way in to the input jack and half way into the headphone jack. It listens to itself and then amplifies all the tones there in as you play with all the tone, saturation and volume knobs.ay not be exactly what you are looking for but is a lot of fun to fuck with and even better if you run a delay or pitch shifter effect pedal in the signal chain.

Unknown said...
This comment has been removed by the author.
VoxLumina said...

UTs (ultrasonic testers) use tranducers/transceivers up to 75MHz. I doubt that a manufacturing company would sell to a private individual or in a reasonable price range. Olympus, Krautkramer, NDT Systems, Modsonic are all companies worth looking into. It might be wise to find an NDT with UT1 or UT2 certification and talk to them about it.

Unknown said...

This is a wonderful article, Given so much info in it, These type of articles keeps the users interest in the website, and keep on sharing more ... good luck.
used laboratory test equipment

Unknown said...

I loved your post very much...Whatever you have represented is too useful...Great idea...Thank you too much......
air curtain suppliers
static pass box manufacturers.

George Mark said...

Nice blog! Thanks for sharing such a creative blog post.You can find best Electronic pest repellent here: Electronic pest repellent

Miles Bellas said...
This comment has been removed by the author.
Miles Bellas said...

The image is from a "Tales of the Unexpected" episode by Roald Dahl who wrote Charlie and the Chocolate Factory, James and the Giant Peach etc... It is one of the more memorable episodes.

This lady describes how she built a "Cymatics Rig" : which may be similar ?

Unknown said...

Hello! My name is Kody Tillotson!!! Is this how to contact the real Hamilton Morris? I have compiled a unique scientific dissertation about an all-science of geometry, mathematics, and the inherent substance states of water which may actually produce or at least record these mathematics. Muonic Crystals measure speed and "to the power of", calculations - Alkaline Muons measure simultaneous adding and subtracting - Inert Gas Hydrates measure division - while Bose Einstein Condensates measure multiplication. These are fairly simple statements on their own - but I have compiled this 50+ paged paper with exact states - and for example - believe to have discovered the path of how ALL possible mathematical phenomena and abnormalities work and co-exist - based solely on these and other proposed sole parts of water itself. I am in important need of your help - and I could not say that this is not your next big lead to Perfecting your studies. I also use these formulas to describe how to isolate and Co-create all possible edible psychoactive substances from any plant that meets one of the 9 groups of certain conditions. for example I will be using certain Oak leafs and even Pumpkin leafs for creating substances similar to what the Bufo Toad produces. I have discovered much more: Keys to plant and mushroom breeding using Muonic Hydrogen substitutes and specific Positrons accepted by the DNA of specifically those plants and mushrooms - even how to grow any mycorrhizal mushroom using these same techniques and natural materials. I am desperately in need of a lab partner and someone who I deem Aspiring enough to never miss a thing. May I please send you my dissertation - to see if you would be interested in this task? There is A LOT more that is included - almost everything needed to know about a NEW basics of Chemistry, Physics, and even Genetics. I look forward to the chance of your reply! Joy and health to your thoughts!!! (this could even turn into a Nobel Peace Prize - which I would be happy to share with you if we win!!!) E-mail address:

pure chem sales said...

Nice post your blog is good i will come back to read more from you
Buy APVP Online
Order Medical Marijuana Online
Buy Psychedelics Online From Pure Chem Sales
Buy Research Chemicals Online

Buy Roxicodone Online said...

Best Article buy pain meds online Excellent post. I appreciate this site. Stick with it! Because the admin of this web page is working, no doubt very quickly it will be well-known, due to its quality contents.This website was how do you say it? Relevant!! Finally, I’ve found something that helped me.
Best Article buy Roxicodone Online Excellent post
buy Xanax Online
buy Oxycodone Online

Best Article buy medications online Excellent post. I appreciate this site. Stick with it! Because the admin of this web page is working, no doubt very quickly it will be well-known, due to its quality contents.This website was how do you say it? Relevant!! Finally, I’ve found something that helped me.
buy Roxicodone Online

godson420 said...

Contact us Securely through details below:
- Email :
- Wickr us at : Legitplug422
How and where to Order Prescription Drugs Safely | right place to Order Prescription Drugs Safely Securely .
- Finest and fast services to all our clients, and we make sure they are treated like family.
- We offer a Full Refunds on any Package that does not make it to its destination.
- We are reliable for a long term,communications & transactions are secured .
- Offer safe and discreet overnight shipping (24/H) to clients depending on location
We supply good quality Benzodiazepines, Pain Medications, Anxiety Medications, Relief Medications, Insomnia Medications, Weight Lost Medications, Stimulants, Opiate/Opioid, Research Chemicals, etc...
** Medications **
We do sell meds such as:
Buy Valium Online
- Buy Hydrocodone Online
- Buy Desoxyn Online
- Buy Xanax Online
- Buy Dilaudid Online
- Buy Actavis Promethazine Codeine Purple Cough Syrup Online (16oz and 320z)
- Buy Ambien Online
- Buy Adderall Online
- Buy Ritalin Online
- Buy Vicodin Online
- Buy Ketamine Online
- Buy Soma Online
- Buy Viagra Online
- Buy Dexedrine Online
- Buy Mandrax Online (Quaalude)
- Buy Fentanyl Online
- Buy Demerol Online
- Buy Lyrica Online ,
- Buy Oxycontin Online
- Buy Roxycodone Online
- Buy Rohypnol Online
- Buy Opana Online
- Buy Ativan Online
- Buy MSContin (Morphine Sulfate) Online
- Buy Klonopin Online
- Buy Phentermine Online
- Buy MDMA (Pills and Powder form) Online
- Buy Percocet Online
- Buy Lortab Online
- Buy Norco Online
- Buy Codeine Pills Online
- Buy Suboxone Online
- Buy Methadone Online
** Barbiturates **
- Buy Nembutal (Pentobarbital Sodium) Online
- Buy Seconal (Secobarbital Sodium) Online
- Buy Luminal (Phenobarbital) Online
- Buy Butisol (Butabarbital Sodium) Online
- Buy Pentothal (Thiopental Sodium) Online
- Buy Brevital (Methohexital) Online
- Buy Donnatal (Belladonna and Phenobarbital) Online
- Buy Mebaral (Mephobarbital) Online
** Research Chemicals **
- Buy Etizolam Online
- Buy Ketamine Online
- Buy 25I-NBOMe Online
- Buy 3-MMC Online
- Buy Mephedrone Online
- Buy Ephedrine Hcl Online
- Buy Esctacy Online (MDMA)
- Buy A-pvp Online
- Buy Crystal Meth Online
- Buy JWH 250 & 180 Online
- Buy Mdpv Online
- Buy Mexedrone Online
- Buy Bk-2C-B Online
- Buy Ethylone Online , etc....
Other good stuffs like:
- Buy Potassium Cyanide (KCN) Online
- Buy Ketamine Online
- Buy MDMA (Ecstasy) Online
- Buy Carfentanil Online
Are also available.
Whatsapp + 237670682456
E-mail ........