🔊 聲學工具

🔊 一端閉口管基頻（f₁ = v / 4L）Pipe Closed 閉管基頻計算器，輸入管長與聲速，按一端閉口管基頻 f₁=v/4L 求駐波基頻，用於管樂器與聲學共鳴分析。Pipe Closed - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. ➕ 兩個不相干聲源的總聲級Combine Two Spl 聲壓級能量疊加器，輸入兩個不相干聲源的聲壓級，按對數能量疊加求總聲級，用於多噪聲源總聲壓評估。Combine Two Spl - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 兩聲壓級疊加（L = 10·log₁₀(10^(L₁/10)+10^(L₂/10))）Spl Add 聲壓級疊加計算器，輸入兩個聲壓級，按對數能量疊加 L=10·log₁₀(10^(L₁/10)+10^(L₂/10)) 求總聲級，糾正線性相加誤區。Spl Add - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 兩端開口管基頻（f₁ = v / 2L）Pipe Open 輸入管長與聲速，按 f₁=v/(2L) 計算兩端開口管的基頻與諧波，適用於管樂器調音、聲學共振分析與駐波教學演示。Pipe Open - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 〰️ 介質密度與聲速之積Acoustic Impedance 輸入介質密度與聲速，按 Z=ρ·c 計算特性聲阻抗，描述介質對聲波傳播的阻礙，適用於聲學材料選型、阻抗匹配與傳感器耦合設計。Acoustic Impedance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 功率分貝（L = 10·log₁₀(P / P₀)）Decibel Power 輸入功率值與參考功率，按 10·log₁₀(P/P₀) 換算為分貝（dB），將寬動態範圍壓縮為可比量，適用於聲學、電聲與通信功率電平表示。Decibel Power - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📊 功率量之比轉分貝Decibel Power Ratio 輸入兩個功率值，按 10·log₁₀(P₂/P₁) 計算功率比的分貝數，用於放大器增益、聲功率變化等相對量表達，適用於音響與電聲工程。Decibel Power Ratio - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🛡️ 單層均質牆的場隔聲量Mass Law Tl 質量定律隔聲量估算器，輸入頻率與面密度，按 TL≈20·log₁₀(f·m)−48 估算單層均質牆隔聲量，指導隔聲設計。Mass Law Tl - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 固有頻率（f = (1/2π)·√(k/m)）Spring Natural Freq 彈簧-質量系統固有頻率計算器，輸入剛度 k 與質量 m，按 f=(1/2π)·√(k/m) 求無阻尼固有頻率，用於隔振與共振分析。Spring Natural Freq - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📊 場量（電壓/聲壓）之比轉分貝Decibel Voltage Ratio 電壓/聲壓分貝換算器，輸入兩個電壓或聲壓值，按 20·log₁₀(V₂/V₁) 求其比值的分貝數，用於放大器增益與聲學測量。Decibel Voltage Ratio - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 聲學多普勒效應計算器Doppler Acoustic 計算聲源與觀察者相對運動時的多普勒頻移，輸入聲速、源頻與相對速度，輸出觀測頻率，適用於雷達測速、醫學超聲與聲學實驗。Doppler Acoustic - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 聲強級（L_I = 10·log₁₀(I / I₀)）Sound Intensity Level 聲強級計算器，輸入聲強與參考聲強 I₀=1×10⁻¹² W/m²，按 L_I=10·log₁₀(I/I₀) 求聲強級分貝，用於噪聲劑量評估。Sound Intensity Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 聲強距離平方反比計算器Intensity Inverse Square 按距離平方反比定律計算聲強隨傳播距離衰減，輸入源強與距離，輸出各點聲強，適用於噪聲傳播預測、隔音設計與聲場建模。Intensity Inverse Square - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🎵 將頻率映射到最近的十二平均律音名Freq to Note 輸入任意頻率（Hz），按十二平均律與 A4=440 Hz 基準求最接近的標準音名，並給出與標準音的音分偏差，用於音律校對。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... 🔊 弦基頻（f₁ = (1/2L)·√(T/μ)）String Fundamental 弦基頻計算器，輸入張力、線密度與弦長，按 f₁=(1/2L)·√(T/μ) 求兩端固定弦基頻，用於樂器發聲與振動分析。String Fundamental - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 拍頻（f_beat = |f₁ − f₂|）Beat Frequency 拍頻計算器，輸入兩個相近頻率 f₁、f₂，按拍頻=|f₁−f₂| 求疊加產生的振幅週期性起伏頻率，用於調音與干涉分析。Beat Frequency - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 波長頻率（λ = v / f）Wavelength Frequency Convert 輸入波速與頻率，按 λ=v/f 互算聲波波長與頻率，適用於聲學設計、濾波器參數估算與波動方程教學演算。Wavelength Frequency Convert - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 混響時間（T₆₀ = 0.161·V / A）Reverberation Time 賽賓混響時間計算器，輸入房間體積與總吸聲量 A，按 T₆₀=0.161·V/A 估算混響時間，用於廳堂音質設計與噪聲控制。Reverberation Time - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📻 點聲源在距離 r 處的聲強Sound Intensity Spherical 球面擴散聲強計算器，輸入點聲源聲功率與距離 r，按 I=P/(4πr²) 求自由場中距離 r 處的聲強，用於聲源輻射分析。Sound Intensity Spherical - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. ⚡ 由聲功率求聲功率級（W₀=10⁻¹² W）Sound Power Level 輸入聲功率值，以參考功率 W₀=10⁻¹² W 按 10·log₁₀(W/W₀) 計算聲功率級（dB），用於設備噪聲評級、聲功率標稱與環保限值比對。Sound Power Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 由聲壓求聲壓級（p₀=20 µPa）Sound Pressure Level 聲壓級(SPL)計算器，輸入聲壓有效值與參考聲壓 p₀=20µPa，按 SPL=20·log₁₀(p/p₀) 求分貝，用於環境噪聲與設備聲壓測量。Sound Pressure Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📈 由聲強求聲強級（I₀=10⁻¹² W/m²）Intensity Level 輸入聲強值，以參考聲強 I₀=10⁻¹² W/m² 按 10·log₁₀(I/I₀) 計算聲強級（dB），用於噪聲強度等級評定與聽力保護評估。Intensity Level - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 💯 由賽賓公式反推平均吸聲係數Absorption Coeff Sabine 賽賓平均吸聲係數反推器，輸入房間體積、表面積與混響時間，按 ᾱ=0.161·V/(S·RT60) 求平均吸聲係數，用於聲學裝修設計。Absorption Coeff Sabine - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📏 由頻率求波長Wavelength from Freq 輸入頻率與聲速，按 λ=c/f 計算對應聲波波長，用於揚聲器分頻、房間模態與聲學測量中的波長估算。Wavelength from Freq - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 電壓分貝（L = 20·log₁₀(V / V₀)）Decibel Voltage 電壓分貝換算器，輸入電壓值與參考電壓，按 L=20·log₁₀(V/V₀) 將場量表達為分貝，適用於電子與聲學信號電平轉換。Decibel Voltage - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🎯 直達聲與混響聲相等的臨界距離Critical Distance 臨界距離估算器，輸入房間體積、混響時間與指向性因子，按 r_c≈0.141·√(Q·V/RT60) 求直達聲與混響聲相等的臨界距離。Critical Distance - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 📦 矩形房間軸向共振頻率Room Axial Mode 房間軸向共振頻率計算器，輸入房間尺寸與模式階數 n，按 f=n·c/(2L) 求矩形房軸向駐波頻率，輔助建築聲學缺陷排查。Room Axial Mode - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools. 🔊 空氣中聲速（v = 331.4 + 0.6·T）Sound Speed Air 輸入空氣温度，按 v=331.4+0.6·T 估算幹空氣中聲速，用於聲學測距、延遲補償與温度相關的聲場計算，適用於實驗與工程估算。Sound Speed Air - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Acoustics tools.