@article {58243,
	title = {A new biophysical method to determine the gain of the acoustic trachea in bushcrickets},
	year = {1994},
	abstract = {<p>A method is described for measuring the gain (i.e., the change of amplitude and phase angle) for sounds that propagate to the internal surface of the tympana in ears working as pressure difference receivers. The gain of the acoustic trachea has been measured in two similarly sized and closely related species of bushcrickets, in which the acoustic spiracles and tracheae differ markedly in size. The amplitude part of the gain is much larger in the species with the larger acoustic spiracle, whereas the phase part is very similar in the two species. The method is compared with other methods, which in the past have been used for estimating the gain of sound pathways inside animal bodies.</p>
},
	keywords = {bushcricket, hearing, Pressure difference receiver},
	doi = {10.1007/BF00215110},
	url = {http://link.springer.com/10.1007/BF00215110},
	author = {Michelsen, A. and Rohrseitz, K. and Heller, K.-G. and Stumpner, A.}
}
@article {52606,
	title = {Auditory DUM neurons in a bush-cricket: A filter bank for carrier frequency},
	journal = {Journal of Comparative Neurology},
	year = {2018},
	month = {Jun-01-2020},
	abstract = {<p>In bush-crickets the first stage of central auditory processing occurs in the prothoracic ganglion. About 15 to 50 different auditory dorsal unpaired median neurons (DUM neurons) exist but they have not been studied in any detail. These DUM-neurons may be classified into seven different morphological types, although, there is only limited correlation between morphology and physiological responses. 97\% of the stained neurons were local, 3\% were intersegmental. About 90\% project nearly exclusively into the auditory neuropile, and 45\% into restricted areas therein. Lateral extensions overlap with the axons of primary auditory sensory neurons close to their branching point. DUM neurons are typically tuned to frequencies covering the range between 2 and 50 kHz and thereby may establish a filter bank for carrier frequency. Less than 10\% of DUM-neurons have their branches in adjacent and more posterior regions of the auditory neuropile and are mostly tuned to low frequencies, less sensitive than the other types and respond to vibration. 35\% of DUM show indications of inhibition, either through reduced responses at higher intensities, or by hyperpolarizing responses to sound. Most DUM-neurons produce phasic spike responses preferably at higher intensities. Spikes may be elicited by intracellular current injection. Preliminary data suggest that auditory DUM-neurons have GABA as transmitter and therefore may inhibit other auditory interneurons. From all known local auditory neurons, only DUM neurons have frequency specific responses which appear suited for local processing relevant for acoustic communication in bush crickets. This article is protected by copyright. All rights reserved.</p>
},
	keywords = {carrier frequency, hearing, Invertebrate, local neuron},
	doi = {10.1002/cne.24399},
	url = {http://doi.wiley.com/10.1002/cne.24399},
	author = {Lefebvre, Paule Chlo{\'e} and Seifert, Marvin and Stumpner, Andreas}
}
