volume expander


Also found in: Medical.

volume expander

[′väl·yəm ik‚span·dər]
(engineering acoustics)
An audio-frequency control circuit sometimes used to increase the volume range of a radio program or recording by making weak sounds weaker and loud sounds louder; the expander counteracts volume compression at the transmitter or recording studio. Also known as automatic volume expander.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Because Albumin is not meant for daily volume therapy, only gelatins are available as volume expander or plasma alternative.
We used a special fluid called a plasma volume expander to help to support her circulation and I took a blood sample from her.
Hextend (6% Hetastarch in Lactated Electrolyte Injection) is BioTime's commercially-available blood plasma volume expander used to treat hypovolemia (low blood volume).
She denied having done so in evidence, insisting she thought it was either saline solution or Gelofusine, a blood volume expander to boost blood pressure.
"There is no justification for the use of FFP as a volume expander. Safer alternative therapy exists."