Related by context. Frequent words. (Click for all words.) 57 underwater microphones 56 ganglion cells 55 infrared beam 55 kilohertz 55 infrasound 54 tuning forks 53 echolocation 53 vocalisations 53 oscillatory 53 ultrasonic waves 53 directivity 53 vocalizations 52 flapping wings 52 millivolts 52 rustling leaves 52 amplitudes 52 geophone 52 fluorescent molecules 52 ultrasonic 51 hydrophone 51 entangled photons 51 electromagnetic pulses 51 birdcalls 50 microwave frequencies 50 auditory nerve 50 hydrophones 50 electromagnetic waves 50 binaural 50 electrochemically 50 stereocilia 50 analog circuitry 50 dipole 50 voltmeter 50 terahertz radiation 50 microelectrodes 50 dispersive 49 crackling noise 49 vocal folds 49 vacuum tube 49 retinal ganglion cells 49 spectrally 49 resonators 49 photonic crystal 49 sensory stimuli 49 excitations 49 sensor arrays 49 electrical currents 49 resonant frequency 49 photocell 48 hertz 48 Piezoelectric 48 electromagnetic induction 48 stereophonic 48 ultrasonics 48 pulsed laser 48 harmonics 48 dipoles 48 sine wave 48 impedances 48 pitched squeal 48 odorants 48 laser beams 48 sonars 48 bone conduction 48 fluorophores 48 electrical pulses 48 surface plasmons 48 Tesla coil 48 soundfield 48 nuisance alarms 48 hissing sound 48 anechoic chamber 48 vocalization 48 fluorescent probes 48 waveguide 47 airflows 47 photoreceptor 47 sideband 47 interferometric 47 cochlea 47 microwave radiation 47 Photons 47 electromagnets 47 sensors actuators 47 atmospheric turbulence 47 EEGs 47 zinc oxide nanowires 47 Metamaterials 47 near infrared NIR 47 helicopter rotors 47 toadfish 47 laser pulses 47 muons 47 magnetic flux 47 shorter wavelengths 47 magnetic fields 47 quantum entanglement 47 infrared laser 47 electromagnetic 47 audible 47 spectrographs