sound waves have frequency, and ?

(a)  

sound waves reflect and?

(a)  

the speed of sound in air at room temperature (20C) is?

(a)  

the amplitude of a sound wave is measured in what?

(a)  

the loudness of sound as perceived by the ear and brain depends mainly on its what?

(a)  

the loudness of sound is measured in terms of what?

(a)  

is the energy that travels in a given area perpendicular to the direction of the energy flow per unit time

(a)  

the (a)   of a sound wave is heard as its pitch

the lower the pitch the lower its what

(a)  

the ear is a device for detecting sound whose frequency ranges from what?

(a)  

sound waves above 20,000 Hz are called what

(a)  

sound waves below 20Hz are called what

(a)  

is the change in frequency of sound caused by the motion of either the source of detector

(a)  

occurs when periodic impulses are applied to a system at a frequency equal to one of its natural frequencies of oscillation

(a)  

a shell of high pressure produced by the motion of an object whose speed exceeds that of sound

(a)  

is produced by vibrating objects in matter

(a)  

most sounds are __ waves that are composed of more than one __

(a)  

can resonate with a sound source, increasing its amplitude

(a)  

resonates when its length is λ/2, 2λ/2, 3λ/2, and so on

(a)  

resonates when its length is λ/4, 3λ/4, 5λ/4 and so on

(a)  

converts the energy carried by a sound wave into another form of energy

(a)  

the frequencies and intensifies of the complex waves produced by a musical instrument determines the (a)   that is characteristics of that instrument

the fundamental frequency and harmonies can be described in terms of what

(a)  

the shape of the throat and mouth cavity determines the what of the human voice

(a)  

notes on a musical scale differ in what by small whole number ratios

(a)  

how many waves with almost the same frequency interfere to produce a beat note

(a)