Bicycle Sounder / Noise-maker: For continous aural-visibility, soundprint, hear-me-coming full time bell/horn/roar

STOP PRESS
Unfortunately the light / siren I mention above died on its second outing in drizzle. It is not waterproof and therefore not suitable for a bike ridden in all weathers.

 I tend to pedal all the time so a noisy freewheel hub will probably not work. I have considered freely hangng bells and will look into them agian. I have no rodent buddies.

My homemade sounder (of 4 years ago) never reached fruition but I still wanted one, and recently, for other reasons, I purchased a LED light which uses a 18650 cell and has a mini, and fairly quiet, "police" siren in the cap. As an alarm it is pretty useless because it is too quiet, but as a sounder, to make a cyclist more discernable, to other cyclists and pedestrians at least, I think it is at an appropriate level.

The (high) pitch of the siren also distinguishes it from car sounds so that one can still hear cars coming with it turned on. I guess that the low volume level will allow it to be used for a long time on one charge. It is annoying though. I think I will only turn on the siren occasionally, such as when undertaking cars in a traffic jam on a shopping street, or in a tunnel.

This is the ali link of a similar product (the supplier that I purchased from is out of stock). No affiliation.
https://www.aliexpress.com/item/32911998007.html?gps-id=detail404&scm=10...

They said it could not be done But here it is http://youtu.be/t7B423gHPjw The 6 sound horn (the all black horn shaped type in my video above) runs on a single AA battery. That means a 9V horn is being powered by a 1.5v battery for a long life sounder. The sound is a little quiet (and too loud with 3v) The case may fit two AA batteries in parallel or perhaps yes, with a bit of chiselling a C sized battery which holds 8000 mAH - the equivalent of about three AA cells and two full 1850 charges! The alarm has been on for more than 1 hour and it still is meaningul. Yes, even at 2 hours it should warn pedestrians of my approach. It should last at 5 hours on a C battery. I am only in town for about 20 minutes of my normal route and it is only during rush hours, or when I am in a rush, that I would want to use it, I think, So it should last about 15 rush hour rides or about 3 weeks on a battery. I ordered one of these push switches http://www.aliexpress.com/item/New-2pcs-Locking-Latching-Push-Button-Swi... It is far from ideal. It would be far better if I could choose the sound - the buzzer sound is best rather than the syren sounds. I wish it ran from a 18650 and were an option of the 6 sound horn that I have. If I were keener and bought the right push switch I could achieve that. I tried powering it with a 4.2 volt 18650 but it was too loud.

I still have not got around to making this and have mislaid the switch. Another switch ordered.
http://www.ebay.com/itm/BLUE-12mm-Car-Boat-Locking-Latching-Push-Button-...

Yes... After I posted my last post it occurred to me that I don't need to be loud enough to be heard by car drivers so much as pedestrians and other cyclists. Which is not very loud.

I do quite a lot of shouting (today I mended my 6 sound horn, so I may be doing less). But perhaps it is me that is easily embarrassed. I find it a little difficult to shout as I go along. Self-conscious. I am not sure why. I need a bleeper.

I am going to try and attach a 6 sound horn, which usually uses 9V to a 3.7 volt battery and see if it still makes a noise as mentioned above. If it does then I predict is should make a fairly quiet but pedestrian hearable siren sound, and last for quite a while. I will report back.

This also runs on 9v so a 3.7v battery might make it suitably not-too-loud
http://www.aliexpress.com/item/Motorbike-Alarm-Beeper-warner-Security-Bi...

I am not sure how much noise would be needed but as much as a scooter I was thinking. Perhaps cars don't hear scooters either.

>Something that jangles on the bike. A bell maybe.
Yes. Cow bell, like. Or, here in Japan hikers have bells on their belts, I believe, to warn bears of their approach. That would not use up my Cancellara.

Dynamos and loose cranks bolts would really slow me down.

The noise only needs to be intermittent, and on a 18650 battery I think if it were intermittent, it could last at least as long as my lights.

I would look up white noise maker but I have already looked up "noise maker" and have not had much luck.

While I can't sing, I do do quite a lot of vocalisation, not only because I am mad but also because all the electric horns I have tried, like fenix says, they break, so rather than bleep a 6 Sound Horn (here below is my review)
https://www.youtube.com/watch?v=DgBLXFMpV6Y
I shout. The above 6 sound thing from about 4USD on aliexpress is not bad, while it works. If it had a bleep once a second for 100 milliseconds option and ran on a 18650 as opposed to a 9v box battery, it would do. I wish I could get in touch with "Everest" which is the brand. (Hmm. On the 3.7 volts of a 18650 battery it would a lot quieter, about 1/3 the volume, which would be about right, assuming it makes a sound at all. I may try that)

I live in hope of finding a clicker, beeper etc. The only thing I can think of in 100 yen shops (dollar stores, I am not sure if there is a UK equivalent) is the little rape alarms that run on button batteries. One of those attached to a 18650 would last a while but be far too loud. They don't sell quiet intermittent rape alarms but perhaps the voltage of the button batteries is higher (as the button batteries may be in series) than a 18650 @3.7v. so it might run longer and quieter both of which is desirable.

It is really strange to me that nothing exists to increase the road bike cyclists sound-print. The problem may be, in addition to those that like the quiet aesthethic, I believe, that most road bikers are, despite the fact that they even if middle aged like me wear stretch tight lycra, they are nonetheless it seems quite shy and embarrassable, wanting to wear stealth lycra (why are so many cycling lycra pants in black?! I want visibility!), and avoid bike set ups that are not UCI approved and thus look 'strange'. I have no shame, and for safety's sake at least, I want to stand out in every way possible. Bleep, bleep, bleep. Nothing jarring. Just bleep bleep bleep, as I pelt along in traffic.

Tim

Thank you the replies, especially for trottify but again, it would add resistance.

I did try a piece of a fish punnet in the wheels, with the remained of the punnet attached to the rear triangle as a sort of sound box, but yes, I am Fabian Cancellara's dad, and I want to get as much speed from my legs as I can, so the added resistance was unacceptable.

It is because I go so fast (well, for me, 21mph) that I want to be heard coming.

I think that the batteries electronic device that makes a noise of some sort every second or so would last quite a long time