The 相对 volume of a 声波 范围（排列） from 响 to quiet
响度 can be scientifically 定义 in 术语 of 振幅 BUT it is in fact a 相对 property of 声波
if we have a quiet 声波 followed by a 'loud' 声波 the 'loud' 声波 will appear to 声波 更响 than if the 'loud' 声波 is preceded by another 响 声波 In this way if we want something to 声波 very 响 we should 环绕 it with 静 or very quiet 声
What is Loudness?
响度 is a way of 描述 the volume of one 声波 相对 to another
In 传统 记谱法 响度 or dynamics is indicated by symbols below the 樂/乐 stave p or f
When 描述 声 outside of this 传统 we can say that 声 范围（排列） from being quiet to 响
响度 is Relative
An interesting 方面 of 响度 is that it is all 相对 A 响 声波 in a noisy place will seem less 响 than exactly the same 声波 in a quiet place
控制 Loudness
By a simple change of 响度 a 种类 of 声波 can 突然 or gradually become more or less prominent against its 背景
We can 影响 the 响度 of 声 by applying or lowering the 增益 In this way composers and 工作室 engineers are able to balance the 声 in their 作品
The faders on large 混 consoles are designed to give hands on 控制 of the 响度 for many 声 at the same 时间
作曲 with 声 has its own 数字 faders within the 算機/计算机 programme to allow you to change the 相对 级 of the 声 within your 作品 When you see the 'Gain Badge' you'll be able to change the 响度 of the 声波 文件
近 and Loudness
距 of course also affects 响度 The closer we stand to an 对象 that is producing 声波 then the 更响 that 声波 will appear to us
This might seem obvious but it can be very useful to think about this in 作曲 识别 this 重要 fact can allow us 作品 out how to produce the 印象 of 声 moving towards or away from us or for 声 that are close or distant
A 响 对象 that is far away may appear to 声波 quieter than it actually is
For 例如
think of an ambulance When it is far away its siren 声 quiet but the closer that it gets the 更响 the siren becomes until the ambulance directly passes you and the siren is deafening
Monitoring Loudness
Because we only have one pair of 耳 its very 重要 that we protect them 响 声 can damage your 耳 PERMANENTLY Once they have been damaged by 响 声 there is no way of repairing them
Therefore it is really 重要 to be able to see the volume 级 when working with or 聆 to 声 Most 樂/乐 软件 will have a bar that displays the 输出 级 Green is 低 or safe yellow is the danger zone and red is 响 不 only will having 声 in the red 级 damage your 听觉 but it will also cause 削峰 and 失真 on your 声
Extra
How does 响度 Work?
响度 and volume are directly caused by the amount of air displaced by a 颤 对象 The more air that is displaced the 更响 the 声波 will appear
例如
1 A string is gently plucked The string vibrates and moves back and forth a little bit
◦Because the string only moves back and forth a small amount very little air is displaced
◦Therefore the 声波 is very quiet
2 A string is thwacked hard! The string vibrates back and forth moving far from its resting point
◦Because the string moves back and forth a lot it pushes away and displaces a lot more air
◦This 较高 'air pressure' 创作 by the pushing away of more air results in a 更响 声波
Often 人 talk of measuring 声波 压力 级 SPL which is a 科学 measurement of 响度 and the amount of air that is being displaced
百科
The 相对 volume of a 声波 范围（排列） from 响 to quiet
响度 can be scientifically 定义 in 术语 of 振幅 BUT it is in fact a 相对 property of 声波
For 例如
if we have a quiet 声波 followed by a ‘loud’ 声波 the ‘loud’ 声波 will appear to 声波 更响 than if the ‘loud’ 声波 is preceded by another 响 声波 In this way if we want something to 声波 very 响 we should 环绕 it with 静 or very quiet 声
Careful 响 声 can damage your 耳 PERMANENTLY!