Sounds most likely to trigger happy memories include birdsong, a waterfall and purring cat

Sound is also said to set off the best memories ahead of sight and even smell, according to the research.
Others said a cat purring, trees blowing in the wind, a crackling fireplace and church bells would take them to another place in their memories.
For some, rain on the windows, sheep bleating and a train going over tracks are enough to make them smile.
Gordon Harrison, chief audiologist at Specsavers, which commissioned the research, said: “Sound impacts most aspects of our lives, so it is no surprise that certain sounds trigger happy youthful memories – particularly when it comes to sounds of the outdoor.
“However, given the importance of our hearing, it is important to be checked out regularly to ensure such memories aren’t lost along with reduced hearing.”
The kettle boiling, the radio playing and airplanes flying overhead, also featured in the top 40 positively-triggering sounds, according to the over 50s.


