Ringtones basically refer to customized alerting sounds or music on mobile phones for calls received on them. While a telephone also has ringtones to announce an incoming call, the term is more relevant in the context of mobile phones. Ringtones for mobile phones have elements of personalization that make them highly popular as people can have on their phones diverse ringtones that can also be changed at will. There are no features more in demand on internet than mobile phone ringtones.

The human ears can no longer hear the sounds lying in the high frequency zone but are audible to humans with aging of people. The more the age, the more difficult it becomes to hear sound of frequencies above 10 kHz although human ear is capable of hearing sounds up to 20 kHz and even a little higher in exceptional cases. The onset of such decline starts from the age of 20 and gets worse with advancing age.

There are situations when the high frequency mosquito ringtone cannot be heard. The various contributing factors for these may be natural, environmental or merely psychological. Age is one of the most potent factors for inaudibility of mosquito ringtone. As people grow older, the internal organs for hearing like the inner ear and the eardrum become weaker. The very high frequency sounds cannot be heard as people advance in age which has been medically established.