Sound:
Pressure waves produced when an object vibrates at a frequency between 20 Hz and 20000 Hz and there is a material medium that sound can travel through.
Loudness:
How loud or soft a sound is; loudness is related to the amount of energy that reaches our ears per unit of time.Pitch:
How high or low a sound is; pitch is related to the frequency of the vibration that produces the sound.Timbre:
Quality of a sound that makes it different from other sounds of the same pitch and loudness; timbre is related to the shape of the sound wave.Echo:
Reflection of sound from a surface that is more than 17 m away from the emitter.Reverberation:
Reflection of sound on a surface that is less than 17 m away from the emitter.Vibration:
Mechanical oscillation; movement of an object around a central position of equilibrium.Oscillation:
Repeated variation around a central position of equilibrium, first in one direction and then in the other.Compression:
Increase in air pressure that forms part of a sound wave.Rarefaction:
Decrease in air pressure that forms part of a sound wave.Electrical Impulse:
Signal carried by the nervous system.Propagate:
Multiply or increase, spread to a larger area.Disturbance:
Change in normal conditions.Homogeneous:
Uniform in composition; all parts have the same properties.Hearing Threshold:
Minimum loudness at which we can hear sounds.Pain Threshold:
Loudness at which sound becomes intolerable for the listener.Attenuate:
Decrease the intensity of something.Pollution:
Contamination of the environment, often caused by human activity.Silencer:
Part of a machine designed to muffle sound emissions.
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