heart sound detection instrument
passive sound detection
detection of underwater sound field
determination of sound source bearing
heart sound signals detection
sound power determination
Sound-infrared Compound Detection
determination of range of audibility of sound signal
a sound mind in a sound body
infra-audible sound (=infrasonic sound)
rate of sound and attenuation of sound
sound absorption-sound insulation-vibration isolation technology
sound intensity and sound intensity level
sound navigation and ranging or sound radar
sound pressure and pressure level of sound
Detection and determination of heavy metals
harmonic detection and inter-harmonic detection