Just in case you were wondering, my blogs are still going to appear on a regular basis, but less frequently than before. Sometimes it's tricky to fit everything in and given the choice between writing this or being outside in the sunshine you can guess which one is going to win!

As I mentioned previously there are new toys that I have been playing with so this is my quick round up of number two, which is my Airzound.

An Airzound is basically a115 decibel, rechargeable air horn; it uses compressed air which you can pump in via your bike pump. When fully pumped it can emit a very loud warning honk and should you decide to hold it down (or use it a lot) you should get about 30 seconds before it runs out of air.

Unless you misuse it (or have an unfortunate ride) you should have enough pressure to last a reasonable amount of time between charges. A couple short sharp bursts normally does the trick and a few light taps can work well as a warning at junctions.

My first impression when trying it out for the first time was an expletive followed by my ears ringing - tip number one, don't use it indoors...it is very loud!

My next challenge was fitting it to my bike, the reservoir for the air is a bike bottle so this fits easily in a bottle cage, although it also comes with Velcro fittings that allow you to fix it to any part of your frame.

Fitting the actual horn to my handlebars was slightly more challenging as it's designed to fit the "old" standard of 25.4mm bars whereas most newer bikes now seem to be fitted with the "new" standard of 31.8mm bars.

This wasn't really a problem as a few strategically placed zip ties means that it's securely in place. The hose the runs from the bottle to the horn was easy for me as I used the braze-ons on my frame that are normally used for a rear brake cable (as my commuter is fixed gear I only run a front brake).

Once the Airzound was fitted I was itching to get the opportunity to use it; in this respect I have been somewhat disappointed...

The Airzound itself is amazing, very loud and there's no chance of being missed by anyone when you give them a blast.

My disappointment is due to two reasons; firstly I am very reluctant to use the horn to warn pedestrians and other non-vehicular users of my approach, so as a replacement to a bell, simply because it's just too loud for this! I am worried about causing alarm by the sheer volume of the thing so it remains unused away from the roads and traffic.

The second reason for my disappointment is just down to not really having many reasons to use the horn in traffic. The helmet camera has also shown that incidents with traffic are not that frequent. Despite all the reports and complaints about bad driving from all quarters, I've realised that they are just not as common as I thought they were, unless I've just been very lucky over the last few weeks of course!

So, I have yet to get the chance to give the Airzound a proper test, I have used it as I will explain shortly, but I haven't been able to judge its effectiveness yet.

My last blog was a quick review of my helmet camera and there were some very interesting comments made. I should point out that whilst most people seemed to be impressed with the quality of the footage this was also greatly reduced in size and detail when compared to the raw footage captured by the camera.

A number of comments entered into the great helmet debate. I have stated before that I don't really want to get started on this as there are lots of reports that will both support and revoke the arguments around the wearing of a cycle helmet. The only thing I will say is that I choose to wear a helmet and like those who ride with me to do the same. I also support the fact that helmet wearing is not compulsory and that it's a personal choice.

As for the additional weight of the camera on my helmet, it's so light as to not be noticeable so doesn't cause an issue and in the event of a crash it will come away from the helmet.

As the last blog was so specific about the camera and the footage I posted I do feel that it's relevant to respond to some of the comments: "When you came off the Boscombe Prom to the roundabout, it is apparent ('cos the cam was on your helmet) you did not turn your head to the right to make sure there was no traffic already on the roundabout that you should have given way to."

I agree with the comment responding to this "At 47 seconds in you can see David's head turn to the right as he looks to make sure it's clear. What you can't see is that when using a helmet camera, the camera points where you head is facing, but your eyes look further round. There's a definite check at this point to make sure it's clear."

Other footage sometimes shows me appearing to look at my handlebars when in fact I'm looking at my back wheel or my bottle. In addition I have noticed that when looking back to check for traffic before turning the camera footage just appears to show a glance to the right.

"As you exit the Boscombe Pier roundabout (@54 sec) there's one of those "ROGUE" cyclist just setting off to ride round it in the wrong direction." Sorry didn't notice them and haven't reviewed the footage to check.

At that time of the evening with very little traffic around it's not really an issue is it? More of an issue is the runner on Friday morning who decided to cross in front of me when I was coming down the hill towards the pier yelling about me going too fast (I was going less than the 30mph speed limit), I wonder if he does this to cars as well?

One very interesting comment is this one: "the video starts with a vehicle getting rather close but not dangerously". I did purposefully include this footage to see what comments would be made. I completely disagree with the comment; the car was far too close to me and did get a blast on the Airzound.

The Highway Code is quite clear on how much room drivers should give to cyclists and that fact that I could have touched this car shows that he was too close.

This particular stretch is very dangerous for cyclists and if it hadn't been for the car pulling out I would have been occupying the space he was in to prevent the overtake that then followed from the blue van through the pinch point by the traffic island. Just a few days later a colleague of mine was knocked off his bike by a motorist carrying out almost exactly the same manoeuvre.

Based on information supplied by David Brown.