abdomen acoustic contrast factor acoustic rheometer acoustic targeted drug delivery acoustics aerospace animal echolocation athletic training bacteria bat bat detector biology biopsy blood-brain barrier bubble fusion cataract cavitation cement chemistry clupeiformes cochlea cochrane collaboration computed tomography concrete cytology density dental hygienist dentistry diving regulator dog dog whistle doppler ear elastography electroacoustic phenomena emergency ultrasound endovenous laser treatment experimental cancer treatment fetus fluid mechanics frequency gestational age herring hertz high intensity focused ultrasound histology human humidifier hypersonic effect indoor positioning system industry inert infrasound insect jewellery lesion light liposuction low-pass filter low intensity pulsed ultrasound magnetic resonance imaging medical imaging medical ultrasonography metal middle ear modulated ultrasound molecule moth mouse nebulizer nondestructive testing nuclear fusion obstetric ultrasonography occupational therapy ophthalmic passivation pelvis phacoemulsification physical therapy pregnancy prenatal care psychoacoustics q factor rectum rheology rodent sclerotherapy sewage shad sonar sonic weaponry sonochemistry sonographer sonoluminescence sound sound from ultrasound spline standing wave stroke supersonic surface area testicle therapeutic ultrasound thyroid tissue plasminogen activator ultrasonic hearing ultrasonic testing ultrasound-enhanced systemic thrombolysis ultrasound identification ultrasound attenuation spectroscopy university of alberta vagina watch wave wood