1. I need to record the sound she hears (wind turbine and car noise) and play it back to her very quietly and over weeks, gradually increasing the volume to try and de-sensitize her. Any suggestions of how I can do this please?
2. I need something like a bat detector that changes the sound she hears into a sound I can hear so I know when she is being affected.
3. Would it be possible to cancel out the sound she hears using 'white noise'? Maybe using a CD in the car and develop something to she can wear on her collar or maybe earphones for when out walking.
I am conscious I am writing this on 1st April. This is not an April Fool. We have tried so many things to help her that have not worked so I am now looking 'outside the box' to come up with alternatives. I'm sure I am not the only person with a dog like this so the solutions could help others, not just me. If this is not the right place to post the query, perhaps someone could suggest a place I can go to get some answers. I am grateful for any help. Thank you.
If you want to record these very low frequency sounds, check the frequency responses of the microphones / recorders /amplifiers / speakers very carefully. It is usual (esp. in low-cost items) for the LF response to be reduced below (say) 100Hz to reduce mains hum and other intrusive noises.
I have not heard of any "reverse bat detectors", but would a straightforward noise meter - analogue or digital - work? Again look at the quoted LF response.
Noise cancelling headphones are available, but these are expensive, and made for humans! However might be worth an enquiry.
Hope this helps
If possible I would like to find out more about wind turbines and the noises they give off. Do they give off sound even when not turning for example? Would anyone know where I might ask? A forum maybe?
Thanks very much.
Google is the Universal Guru for finding things. Search for "infra-sonic microphones / anything else". Professional equipment will be very expensive, but look on stormwise.com - there is a simple infra-sonic microphone which you can build at home. I doubt if PC World have anything of use for your particular project.
If you are going to buy anything, including noise-cancelling headphones, try Amazon first to see what they have. I am continually amazed at their range of goods.
Wind turbines are a very emotive subject to many people (for and against!) and I think you will have many hours researching their noise generating abilities, or lack thereof. Don't forget that anything which disrupts the free flow of wind houses, flagpoles, chimneys, virtually anything with a profile will produce noise of one form or another - but a lot will be in the infra-sonic region.
Let us know how you get on!
The different connections will probably differ from microphone to microphone - you will have to look at the specs. Commonly used ones are the mini jack plugs which will go into the mic input on your computer. You might be able to find some with USB plugs also. Search for "noise meters with USB output". Noise meters will have settings which effectively change the weighting of different frequencies to match different uses. Again, find out from the specifications. Experimentation will probably be needed!