Acoustics


 *  Speed: is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations
 *  Frequency: the number of cycles of the repetitive waveform per second.
 *  Wavelength: is the distance between waves
 *  Longitudinal and Transverse: Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. Through solids, however, it can be transmitted as both longitudinal waves and transverse waves. Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction, while transverse waves (in solids) are waves of alternating sheer stress at right angle to the direction of propagation.

Videos:

Sound is created when an object vibrates, and it travels through the air in waves to the listener Three different sources of sound give voice to musical instruments, vibrating columns of air, vibrating surfaces, and vibrating strings lastly, the video talks about the three auditory effects of musical sounds, loudness, pitch and quality.

Reverberance: is linked to the speed at which sound energy disappears in a room. An unfurnished room with hard surfaces, such as a church, is perceived as being more reverberant than a well-furnished living room.
 * __Notes__ **

Soundproofing (sound blocking): If the objective is to stop sound from entering or leaving a space, then you will most likely need sound blocking or soundproofing.

Sound absorption (acoustic enhancement): If the objective is to enhance the properties of sound by improving speech clarity and sound quality, then the answer is sound absorption or acoustic enhancement.