🔊 声学工具

🔊 一端闭口管基频（f₁ = v / 4L）Pipe Closed 闭管基频计算器，输入管长与声速，按一端闭口管基频 f₁=v/4L 求驻波基频，用于管乐器与声学共鸣分析。Pipe Closed - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. ➕ 两个不相干声源的总声级Combine Two Spl 声压级能量叠加器，输入两个不相干声源的声压级，按对数能量叠加求总声级，用于多噪声源总声压评估。Combine Two Spl - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 两声压级叠加（L = 10·log₁₀(10^(L₁/10)+10^(L₂/10))）Spl Add 声压级叠加计算器，输入两个声压级，按对数能量叠加 L=10·log₁₀(10^(L₁/10)+10^(L₂/10)) 求总声级，纠正线性相加误区。Spl Add - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 两端开口管基频（f₁ = v / 2L）Pipe Open 输入管长与声速，按 f₁=v/(2L) 计算两端开口管的基频与谐波，适用于管乐器调音、声学共振分析与驻波教学演示。Pipe Open - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 〰️ 介质密度与声速之积Acoustic Impedance 输入介质密度与声速，按 Z=ρ·c 计算特性声阻抗，描述介质对声波传播的阻碍，适用于声学材料选型、阻抗匹配与传感器耦合设计。Acoustic Impedance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 功率分贝（L = 10·log₁₀(P / P₀)）Decibel Power 输入功率值与参考功率，按 10·log₁₀(P/P₀) 换算为分贝（dB），将宽动态范围压缩为可比量，适用于声学、电声与通信功率电平表示。Decibel Power - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📊 功率量之比转分贝Decibel Power Ratio 输入两个功率值，按 10·log₁₀(P₂/P₁) 计算功率比的分贝数，用于放大器增益、声功率变化等相对量表达，适用于音响与电声工程。Decibel Power Ratio - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🛡️ 单层均质墙的场隔声量Mass Law Tl 质量定律隔声量估算器，输入频率与面密度，按 TL≈20·log₁₀(f·m)−48 估算单层均质墙隔声量，指导隔声设计。Mass Law Tl - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 固有频率（f = (1/2π)·√(k/m)）Spring Natural Freq 弹簧-质量系统固有频率计算器，输入刚度 k 与质量 m，按 f=(1/2π)·√(k/m) 求无阻尼固有频率，用于隔振与共振分析。Spring Natural Freq - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📊 场量（电压/声压）之比转分贝Decibel Voltage Ratio 电压/声压分贝换算器，输入两个电压或声压值，按 20·log₁₀(V₂/V₁) 求其比值的分贝数，用于放大器增益与声学测量。Decibel Voltage Ratio - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 声学多普勒效应计算器Doppler Acoustic 计算声源与观察者相对运动时的多普勒频移，输入声速、源频与相对速度，输出观测频率，适用于雷达测速、医学超声与声学实验。Doppler Acoustic - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 声强级（L_I = 10·log₁₀(I / I₀)）Sound Intensity Level 声强级计算器，输入声强与参考声强 I₀=1×10⁻¹² W/m²，按 L_I=10·log₁₀(I/I₀) 求声强级分贝，用于噪声剂量评估。Sound Intensity Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 声强距离平方反比计算器Intensity Inverse Square 按距离平方反比定律计算声强随传播距离衰减，输入源强与距离，输出各点声强，适用于噪声传播预测、隔音设计与声场建模。Intensity Inverse Square - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🎵 将频率映射到最近的十二平均律音名Freq to Note 输入任意频率（Hz），按十二平均律与 A4=440 Hz 基准求最接近的标准音名，并给出与标准音的音分偏差，用于音律校对。Freq to Note - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics... 🔊 弦基频（f₁ = (1/2L)·√(T/μ)）String Fundamental 弦基频计算器，输入张力、线密度与弦长，按 f₁=(1/2L)·√(T/μ) 求两端固定弦基频，用于乐器发声与振动分析。String Fundamental - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 拍频（f_beat = |f₁ − f₂|）Beat Frequency 拍频计算器，输入两个相近频率 f₁、f₂，按拍频=|f₁−f₂| 求叠加产生的振幅周期性起伏频率，用于调音与干涉分析。Beat Frequency - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 波长频率（λ = v / f）Wavelength Frequency Convert 输入波速与频率，按 λ=v/f 互算声波波长与频率，适用于声学设计、滤波器参数估算与波动方程教学演算。Wavelength Frequency Convert - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 混响时间（T₆₀ = 0.161·V / A）Reverberation Time 赛宾混响时间计算器，输入房间体积与总吸声量 A，按 T₆₀=0.161·V/A 估算混响时间，用于厅堂音质设计与噪声控制。Reverberation Time - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📻 点声源在距离 r 处的声强Sound Intensity Spherical 球面扩散声强计算器，输入点声源声功率与距离 r，按 I=P/(4πr²) 求自由场中距离 r 处的声强，用于声源辐射分析。Sound Intensity Spherical - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. ⚡ 由声功率求声功率级（W₀=10⁻¹² W）Sound Power Level 输入声功率值，以参考功率 W₀=10⁻¹² W 按 10·log₁₀(W/W₀) 计算声功率级（dB），用于设备噪声评级、声功率标称与环保限值比对。Sound Power Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 由声压求声压级（p₀=20 µPa）Sound Pressure Level 声压级(SPL)计算器，输入声压有效值与参考声压 p₀=20µPa，按 SPL=20·log₁₀(p/p₀) 求分贝，用于环境噪声与设备声压测量。Sound Pressure Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📈 由声强求声强级（I₀=10⁻¹² W/m²）Intensity Level 输入声强值，以参考声强 I₀=10⁻¹² W/m² 按 10·log₁₀(I/I₀) 计算声强级（dB），用于噪声强度等级评定与听力保护评估。Intensity Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 💯 由赛宾公式反推平均吸声系数Absorption Coeff Sabine 赛宾平均吸声系数反推器，输入房间体积、表面积与混响时间，按 ᾱ=0.161·V/(S·RT60) 求平均吸声系数，用于声学装修设计。Absorption Coeff Sabine - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📏 由频率求波长Wavelength from Freq 输入频率与声速，按 λ=c/f 计算对应声波波长，用于扬声器分频、房间模态与声学测量中的波长估算。Wavelength from Freq - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 电压分贝（L = 20·log₁₀(V / V₀)）Decibel Voltage 电压分贝换算器，输入电压值与参考电压，按 L=20·log₁₀(V/V₀) 将场量表达为分贝，适用于电子与声学信号电平转换。Decibel Voltage - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🎯 直达声与混响声相等的临界距离Critical Distance 临界距离估算器，输入房间体积、混响时间与指向性因子，按 r_c≈0.141·√(Q·V/RT60) 求直达声与混响声相等的临界距离。Critical Distance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📦 矩形房间轴向共振频率Room Axial Mode 房间轴向共振频率计算器，输入房间尺寸与模式阶数 n，按 f=n·c/(2L) 求矩形房轴向驻波频率，辅助建筑声学缺陷排查。Room Axial Mode - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 空气中声速（v = 331.4 + 0.6·T）Sound Speed Air 输入空气温度，按 v=331.4+0.6·T 估算干空气中声速，用于声学测距、延迟补偿与温度相关的声场计算，适用于实验与工程估算。Sound Speed Air - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools.