BASF LNT (Lean NOx Trap) technology removes NOx from diesel engine exhaust.
[edit on Wikidata] Sounding or urethral sounding is the medical use of probes called sounds to increase the inner diameter of the urethra and to locate obstructions in it. Sounds are also used to stretch the urethra in order to receive genital piercing. Urethral sounding and urethral play are also used to refer to this practice in a sexual context. Urethral play can involve the introduction of either soft or rigid items into the meatus of the penis (as well as farther in).
These buzzers and speakers are used in products such as phones, pagers, smoke detectors, and. appliances like microwaves. How Does It Work. Sound is simply a wave of varying air pressure. These pressure waves cause a thin membrane in the ear to vibrate. and the brain interprets these vibrations as sound. A decibel (dB) scale is used to describe the sound pressure level. (SPL) or loudness of a sound.