murmur. 1  a low, continuous sound, as of a brook, the wind, or trees, or of low, indistinct voices. 2  a mumbled or private expression of discontent. 3  Also called heart murmur. 4  Phonetics. a voice quality in which vibration of the vocal cords is accompanied by the escape of a great deal of air, as in the (h) of ahead; breathy voice.
Cubic yard. A cubic yard is an Imperial / U.S. customary (non-SI non-metric) unit of volume, used in the United States, Canada, and the UK. It is defined as the volume of a cube with sides of 1 yard (3 feet, 36 inches, 0.9144 meters in length. 1 Symbols 1.1 Cubic yard per second. 1.2 Cubic yard per minute.
Two Methods:Determining Volume for 3-D SpacesQuick Trick for Determining Concrete YardageCommunity Q&A. Cubic yards (abbreviated yd3 or cu yd)are a unit of volume measurement equal to the volume of a cube whose sides are exactly one yard in length or about 764.5 liters (202.0 US gal).