When two dihybrid individuals are mated, this is called a dihybrid cross. Even though the parents of a dihybrid cross have the same genotype and phenotype, their offspring could show any one of 9 different genotypes and 4 different phenotypes. The phenotypic ratio of offspring produced from a dihybrid cross is 9:3:3:1. To unlock this lesson you must be a Study.com Member.
Sounds are heard by the ear as either being loud or soft. The loudness of a sound in measured in decibels. Decibels refer to the energy produced by that sound. A human can hear sounds ranging from 0.1 decibels, which is very soft, to sound which measure 120 decibels. Younger people can often hear lower volumes better than older people.
Difference Between Pitch and Volume. Loudness and Pitch are characteristics of sounds. Loudness refers to the magnitude of the sound heard, and pitch is related to the frequency of the sound. Loudness, in common terms, is referred as the volume. Pitch and volume are parts of music and sound engineering vernacular, but the term loudness is used in physics. Pitch is the perception of the highness or the lowness of the sound/tone. It is strongly related to the frequency of the sound, but not exclusively.