{"uid":"cap_7tqdAlom_HSU1Q8FDGgFe","slug":"audio-calc-room-mode-frequencies-d31b4b21","name":"Audio Calc – Room Mode Frequencies","description":"Room mode frequencies (axial, tangential, oblique) for a rectangular room, plus Schroeder frequency from RT60.","url":"https://audio-calc.x402tookit.com/room-modes?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["length","width","height"],"properties":{"rt60":{"type":"number","description":"Reverberation time in seconds, for the Schroeder frequency"},"count":{"type":"integer","description":"How many modes to return, 1 to 100 (default 24)"},"maxHz":{"type":"number","description":"Highest frequency to list, 20 to 1000 (default 300)"},"width":{"type":"number","description":"Room width in metres"},"height":{"type":"number","description":"Room height in metres"},"length":{"type":"number","description":"Room length in metres"},"speedOfSound":{"type":"number","description":"Override the speed of sound in m/s (default from temperature)"},"temperatureC":{"type":"number","description":"Air temperature in C (default 20)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asOf":{"type":["null","string"]},"maxHz":{"type":["null","number"]},"modes":{"type":["array","null"],"items":{"type":"object","properties":{"hz":{"type":["null","number"]},"type":{"type":["null","string"]},"order":{"type":["null","string"]}}}},"source":{"type":["null","string"]},"widthM":{"type":["null","number"]},"heightM":{"type":["null","number"]},"lengthM":{"type":["null","number"]},"reasons":{"type":["array","null"],"items":{"type":"string"}},"summary":{"type":["null","string"]},"verdict":{"type":["null","string"]},"degraded":{"type":["boolean","null"]},"volumeM3":{"type":["null","number"]},"disclaimer":{"type":["null","string"]},"notChecked":{"type":["array","null"],"items":{"type":"string"}},"firstAxialHz":{"type":["null","object"],"properties":{"width":{"type":["null","number"]},"height":{"type":["null","number"]},"length":{"type":["null","number"]}}},"lowestModeHz":{"type":["null","number"]},"speedOfSoundMs":{"type":["null","number"]},"coincidentModePairs":{"type":["null","number"]},"modeCountBelowMaxHz":{"type":["null","number"]},"schroederFrequencyHz":{"type":["null","number"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5Ihu1mYiDtt-EQJ0r4rL0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates axial, tangential, and oblique room mode frequencies for a rectangular room, plus the Schroeder frequency derived from RT60.","exampleAgentPrompt":"Calculate the room modes for a rectangular studio that is 6.5m long, 4.2m wide, and 2.8m high — include modes up to 300 Hz and use an RT60 of 0.4 seconds so I can see the Schroeder frequency too.","exampleUseCases":[{"title":"Home studio acoustic analysis","prompt":"My home studio is 5m long, 3.5m wide, and 2.4m high — can you list all the room modes up to 250 Hz and tell me which ones are axial, tangential, or oblique? I measured an RT60 of about 0.35 seconds."},{"title":"Listening room Schroeder frequency","prompt":"I'm setting up a dedicated listening room that's 7m by 5m by 3m. What's the Schroeder frequency if my RT60 is 0.5 seconds, and can you show me the first 20 modes?"},{"title":"Comparing room dimensions for studio build","prompt":"I'm choosing between two room sizes for a new recording booth. The first option is 4.8m x 3.2m x 2.6m at 20°C — calculate its room modes up to 300 Hz so I can evaluate how the bass frequencies stack up."}],"resultDescription":"Returns a list of room mode frequencies in Hz, each tagged with its type (axial, tangential, oblique) and order notation (e.g. '1,0,0'). Also includes room volume, per-dimension first axial frequencies, the Schroeder frequency (if RT60 was provided), a summary verdict on the room's modal distribution, and any warnings or degraded-result flags.","failureModes":["Missing required dimensions (length, width, height) returns a validation error","Non-physical values (zero or negative dimensions) return an error","RT60 not provided means Schroeder frequency will be null/omitted","maxHz outside the 20–1000 range or count outside 1–100 returns a validation error","Very small rooms may have extremely sparse mode lists below the requested maxHz"],"whenToPreferThis":"Use this endpoint when you need to compute the acoustic resonant frequencies of a rectangular room for studio design, acoustic treatment planning, or listening room evaluation. It is purpose-built for audio/acoustic engineering use cases and returns mode type classifications and Schroeder frequency in a single call, making it more convenient than a general physics calculator.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:13:47.387Z","isFirstParty":false,"canonicalSlug":"audio-calc-room-mode-frequencies-d31b4b21"}