The document discusses key concepts in acoustics including how sound is created, transmitted, and received through vibrations. It explains that sounds fade with distance as the vibrations lose energy. Reflection occurs when sound bounces back off a surface without being absorbed, while absorption converts sound waves to heat to reduce echoes and reverb. Isolation separates unwanted sounds when recording to focus on a single input. Reverb is the buildup of many reflections in a space, affected by the size and materials in a room. Echo is the repeated reflection of a sound until it loses energy, and decay time refers to how long it takes a sound to fade out in a space.

1. Acoustics
The science behindsound
So howissoundcreated,transmittedandreceived.Soundisvibrationsof soundmolecules,
producedbyan electrical output(voice box,frictionect).The reasonwhyyoucant hearpeople from
far awayis because the soundmoleculesrunoutof energytherefore makingitinsufficient.
Reflection- the soundbouncingbackwitoutit beingabsorbed.Forexamplewhenyouspeak,you
may be able to heara slightreflectionof noisebutitisunclearon whatit soundslike.
Abortion- soundwavesconvertedintoanotherformof energy(heat) andtransmittedthoughthe
object.Thiswouldstopthe soundfromechoingandalsolimitthe amountof reverbthat itgivesoff.
In a soundroom,theywouldhave foamaroundthe room to absorbthe soundandeliminatesthe
soundsto a minimal.
Isolation- itisolates soundwavesfromun-wantedsounds whenmixingandcomingupwiththe final
piece.Soyou’re gettingridof the soundsthatyou don’twant,for example if youwanttoisolate the
mic fromall the othersoundsinthe room, you’dhave to isolate the micsoyou can onlyhearthat
soundinput.
Reverb- it’safollowupof the soundafterits beengenerated.It’sageneral build-upof lotsof
reflections.The size andamountof people inahall wouldaffectthe reverbbecause thereare a lot
of objectsforthe soundto be absorbedinto,therefore recedingthe reverb.
Echo- define reflectionof the soundthatisgenerated,whichyoucanhear againon repeatuntil the
soundgenerated hasrunout of energy.
Decay time- the decaytime isthe amountof time usthe soundnotto generate enoughenergyto
reverboff the walls/inthe room.
Anechoicchamber- averyposiespaddedroomtoeliminateall reverbandechoing,ideal fora
recordingbooth
Whena soundreflectsitwill always
bounce off at the same angle it
came inat