 Mole crickets stridulate like other crickets by scraping the rear edge of the left forewing , which forms a plectrum , against the lower surface of the right forewing , which has a ratchet @-@ like series of asymmetric teeth : the more acute edges face backwards , as do those of the plectrum . The plectrum can move forwards with little resistance ; but moving it backwards makes it catch each tooth , setting up a vibration in both wings . The sound @-@ producing stroke is the raising ( levation ) of the wings . The resulting song resembles the result of modulating a pure tone with a 66 Hertz wave to form regular chirps . In G. vineae , the wing levator muscle , which weighs 50 milligrams , can deliver 3 @.@ 5 milliWatts of mechanical power ; G. gryllotalpa can deliver about 1 milliWatt . G. vineae produces an exceptionally loud song from half an hour after sunset , continuing for an hour ; it can be heard up to 600 metres away . At a distance of 1 metre from the burrow , the sound has a mean power over the stridulation cycle of up to 88 decibels ; the loudest recorded peak power was about 92 decibels ; at the mouths of the burrow , the sound reaches around 115 decibels . G. gryllotalpa can deliver a peak sound pressure of 72 decibels and a mean of about 66 decibels . The throat of the horn appears to be tuned ( offering low inductive reactance ) , making the burrow radiate sound efficiently ; the efficiency increases when the burrow is wet and absorbs less sound . Mole crickets are the only insects that construct a sound @-@ producing apparatus . Given the known sensitivity of a cricket 's hearing ( 60 decibels ) , a night @-@ flying G. vineae female should be able to detect the male 's song at a range of 30 metres ; this compares to about 5 metres for a typical Gryllus cricket that does not construct a burrow . 
 Mole crickets stridulate like other crickets by scraping the rear edge of the left forewing , which <a href='uninflect' title='1'><mark>forms</mark></a> a plectrum , against the lower surface of the right forewing , which <a href='got' title='2'><mark>has</mark></a> a ratchet @-@ like series of asymmetric teeth : the more acute edges face backwards , as do those of the plectrum . The plectrum can move forwards with little resistance ; but moving it backwards <a href='uninflect' title='3'><mark>makes</mark></a> it catch each tooth , setting up a vibration in both wings . The sound @-@ producing stroke <a href='drop_aux' title='4'><mark>is</mark></a>the raising ( levation ) of the wings . The resulting song <a href='uninflect' title='5'><mark>resembles</mark></a> the result of modulating a pure tone with a 66 Hertz wave to form regular chirps . In G. vineae , the wing levator muscle , which <a href='uninflect' title='6'><mark>weighs</mark></a> 50 milligrams , can deliver 3 @.@ 5 milliWatts of mechanical power ; G. gryllotalpa can deliver about 1 milliWatt . G. vineae <a href='uninflect' title='7'><mark>produces</mark></a> an exceptionally loud song from half an hour after sunset , continuing for an hour ; it can be heard up to 600 metres away . At a distance of 1 metre from the burrow , the sound <a href='got' title='8'><mark>has</mark></a> a mean power over the stridulation cycle of up to 88 decibels ; the loudest recorded peak power was about 92 decibels ; at the mouths of the burrow , the sound <a href='uninflect' title='9'><mark>reaches</mark></a> around 115 decibels . G. gryllotalpa can deliver a peak sound pressure of 72 decibels and a mean of about 66 decibels . The throat of the horn <a href='uninflect' title='10'><mark>appears</mark></a> to be tuned ( offering low inductive reactance ) , making the burrow radiate sound efficiently ; the efficiency <a href='uninflect' title='11'><mark>increases</mark></a> when the burrow <a href='drop_aux' title='12'><mark>is</mark></a>wet and <a href='uninflect' title='13'><mark>absorbs</mark></a> less sound . Mole crickets <a href='drop_aux' title='14'><mark>are</mark></a>the only insects <a href='null_relcl' title='15'><mark>that</mark></a>construct a sound @-@ producing apparatus . Given the known sensitivity of a cricket <a href='null_genetive' title='16'><mark>'s</mark></a>hearing ( 60 decibels ) , a night @-@ flying G. vineae female should be able to detect the male <a href='null_genetive' title='17'><mark>'s</mark></a>song at a range of 30 metres ; this <a href='uninflect' title='18'><mark>compares</mark></a> to about 5 metres for a typical Gryllus cricket <a href='null_relcl' title='19'><mark>that</mark></a><a href='uninflect' title='20'><mark>does</mark></a> not construct <a href='None' title='21'><mark>a</mark></a><a href='negative_concord' title='22'><mark>burrow</mark></a> . 
Mole crickets stridulate like other crickets by scraping da rear edge of tdaleft forewing , which form a plectrum , against the lower surface of the right forewing , which got a ratchet @-@ like series of asymmetric teef : the more acute edges face backwards , as do those of thdalectrum . The plectrum can move forwards with lil resistance ; but moving it backwards make it catch each tooth , setting up a vibration in both wings . The sound @-@ producing stroke the raising ( levation ) of the wings . Thedasulting song resemble the result of modulating a pure tone w/ a 66 Hertz wave to form regular chirps . In G. vineae , the wing levator muscle , which weigh 50 milligrams , can deliver 3 @.@ 5 milliWatts of mechanical power ; G. gryllotalpa can deliver bout 1 milliWatt . G. vineae produce an exceptionally loud song from half an hour after sunset , continuing for an hr ; it can b heard up to 600 metres away . At a distance of 1 metre from the darow , the sound got a mean power ova the sdadulation cycle of up to 88 decibels ; the lodast recorded peak power was about 92 decibels ; at the mouda of the burrow , the sound reach around 115 decibels . G. gryllotalpa can deliver a peak sound pressure of 72 decibels and a mean of abou66 decibels . The throdaof the horn daear to bbtuned ( offering low inductive reactance ) , makin the burrow radiate sound efficiently ; the efficiday increase when the burrow wet and absorb less sound . Mole crickets the only indats construct a sound @-@ producing apparatus . Given the known sedativity of a cricket  hearing ( 60 decibels ) , a nite @-@ flyin G. vineae female should be able to detect the male  sondat a range of 30 metres ; dis compare to about 5 metres fir a typical Gryllus cricket do not construct no burrow .