They rub their little legs together. =)

very small MP3 players or by rubbing their hind legs together.

rub their back legs together

They rub their wings together. Only the male does it. You can tell the temperature by how fast they chirp.

actualy the male crickets are the ones who make the noise. for mateing purposes "mateing call" they do this by rubing there wings. not there "legs" together . one wing called the scrapper rubs against the still wing called the file produceing a sound that is about 5khz/-chirp-

what knowlage said

Well, I just learnt something from knowledgeispain. He/she is correct. According to Wikipedia: Crickets do not rub their hind legs together to chirp. The left forewing of the male has a thick rib (a modified vein) which bears 50 to 300 ridges. The chirp (which only male crickets can do) is generated by raising their left forewing to a 45 degree angle and rubbing it against the upper hind edge of the right forewing, which has a thick scraper (Berenbaum 1995). This sound producing action is called "stridulation" and the song is species-specific. There are four types of cricket song: The calling song attracts females and repels other males, and is fairly loud. The courting song is used when a female cricket is near, and is a very quiet song. An aggressive song is triggered by chemoreceptors on the antennae that detect the near presence of another male cricket and a copulatory song is produced for a brief period after successful deposition of sperm on the female's eggs.[citation needed] Crickets chirp at different rates depending on their species and the temperature of their environment. Most species chirp at higher rates the higher the temperature is (approx. 62 chirps a minute at 13°C in one common species; each species has its own rate). The relationship between temperature and the rate of chirping is known as Dolbear's Law. In fact, according to this law, it is possible to calculate the temperature in Fahrenheit by adding 40 to the number of chirps produced in 15 seconds by the snowy tree cricket common in the United States.[1] To hear the mating call of other crickets, a cricket has 'ears' located on its knees, just below the joint of the front legs. Their auditory sensation is mediated by tympanic membranes located in their knees. =============

Geographicall location and speacies can also play a part in how loud or how soft the chirp is. i have fount through my personal reasearch tempeture also comes into effect. the range from how agresive or how slow the chirp is.. did this by lowering the temp in one cage and hieghtning it in another

rubbin their little winglets together

hello,by rubbing their hind legs together.