能量 is behind every 声波 it is the cause of 声波 波 共鸣 and all 声 must follow the 自然 laws of 能量

Being aware of 能量 模式 and 流 can help us to 创作 gestures and 声 which listeners find 自然 and 现实


Energy

能量 drives the universe and 理解 the way in which 能量 作品 can provide many points of inspiration for composers

The 主要 rules are
•The amount of 能量 in the universe is always the same No 能量 is ever lost or gained only transferred
•No 转移 of 能量 is 100% efficient and some 能量 will be transferred in 讨厌 ways
•There are six 主要 种类 of 能量
◦Electrical
◦Thermal / Heat
◦Light / Radient
◦Chemical
◦Elastic Potential
◦Kinetic and Vibrational 包括 声波

Each of these 形式 of 能量 act in different ways sometimes storing it up such as chemical and elastic 潜力 and sometimes transferring it such as 电子 thermal radiant and kinetic


能量 in = 声波 out

If 声 are to begin or continue they need 能量 输入 Think for 例如 of 传统 乐器 which will only 创作 声波 if they are being bowed blown scraped plucked or hit All of these 行动 转移 能量 from the 表演者 into the 乐器

The amount of 能量 that is put in will directly 影响 the 属性 of the 声波 out most noticeably in 术语 of 响度 but also in 术语 of 声波 品质 If less 能量 or none is put in then the 声波 will begin to 淡化 away to drop in 响度


Fact
Sounding 对象 won't continue to 振动 forever because resistance in the air and the 固体 of the 对象 itself will slowly drain 能量 away from the back and forth 运动 of the 共鸣

In this 例如 a significant amount of 能量 is 输入 at the start [guitar string is plucked] But 跟随 this 起始 行为 there is no further 能量 输入 and so the 声波 gradually decays dropping in volume and losing the 能量 in the 较高 portion of the 能量 频谱 see the disappearance of the yellow lines representing 分音


能量 Flow

Every sounding 对象 has its own 独特 流 of 能量 that relates to the way in which it vibrates The 能量 流 of a 声波 over 时间 is 描述 by its 包络 see also 起衰延消

BUT it is 可能 for us to apply new envelopes to 现有 声 For 例如 we can apply changes in 响度 over 时间 using 自动化 in order to give a continuous 声波 a changing 能量 profile

In this 例如 a steady （平）方 波 音 has been manipulated with 自动化 changing the 'Gain' 级 This 自动化 has applied a new 包络 类似 to the envelop of the 录制 guitar 声波 above


流动 Gestures

Using 算機/计算机 to 作品 with 声波 provides us with almost unlimited 潜力 in 变形 and 处理 But being 数字 算機/计算机 favour straight lines and all 1 or nothing 0 situations 自然 能量 flows are smoother due to the laws of 能量 and the 物理 过程 of 能量 转移
•The amount of 能量 in the universe is always the same No 能量 is ever lost or gained only transferred
•No 转移 of 能量 is 100% efficient and some 能量 will be transferred in 讨厌 ways

This 中项 that it is 不可能 for new 能量 to 突然 appear from nowhere And that if 能量 转移 was plotted on a graph it would 不 be a straight line

[Image]

Because these 自然 能量 trajectories 环绕 us we are all 潜意识 熟悉 with them This 中项 that when we 听 a 声波 能量 that 突然 appears or one that fails to dissipate naturally we instantly 识别 it as fake because it is disobeying the 基（础） laws of 能量

Smoothing out 自动化 lines and ensuring that there are no sudden gains or losses in 能量 will enable your gestures to 声波 more 自然 and 熟悉 to audiences


New Gestures & Anacrusis

By 跟随 the laws of 能量 转移 we can 创作 new gestures which cannot happen in the real world but which can sit naturally in a 作曲 One of the simplest and most 有效 is to 反转 a 声波 which originally decays This creates a crescendo move from quiet to 响 which 声 according to the laws of 能量 And is regarded as 樂/乐


Anacrusis

When these crescendoing events are placed before 'key sounds' they 形（曲）式 an anacrusis A highly 有效 in 樂/乐 姿态 which launches the 听众 forwards into the 'key sound'

The 能量 of the gradual build up is concentrated into the 'ker-ding' of the bell 制作 it 声波 much more impressive than it would on its own


Using 知识 of 能量 流 in Composition

We can draw any 模式 we like in the 自动化 and apply that as an 包络 to 声 But by examining the way in which 自然 声 功能（函数） we can 学习 to 创作 new and synthesised/manipulated 声 that share some 自然 特征 and which audiences can therefore 理解


Activity
用 能量 as an inspiration to 创作 a short 作品 探索 观念 of 能量 and remember that 能量 is neither lost or gained but transferred

樂/乐 often creates and emotional 流 of 能量 with areas of 高 and 低 紧张 which draw the 听众 along