警报器 音效
Zhilingku Studio / 指令探索无界
《警报器》音效
[Sound effect: Bank robbery alarm with police sirens approaching from distance]
[Duration: 25 seconds]
[Description: Inside a bank, a loud, pulsating electronic alarm blares (alternating high-low tone, approx. 1 second per cycle). The alarm is harsh, with slight echo in the marble hall. After 5 seconds, distant police sirens begin (wailing “nee-naw” pattern, far away). The sirens gradually increase in volume and Doppler effect as they get closer. By 15 seconds, multiple sirens overlap (one from left, one from right), creating a chaotic, urgent soundscape. At 20 seconds, tires screech and a car door slams (close). The alarm continues until the end, with faint shouts and radio static in the background.]
[Mood: Tense, dangerous, urgent, cinematic]
[Texture: Electronic alarm (mid, pulsating) → distant siren (low-mid, wailing) → approaching Doppler (pitch and volume rise) → overlapping sirens (stereo pan) → tire screech (mid, brief) → door slam (low thud) → radio static (high, sparse)]
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银行警报声使用经典的交替双音（如 800Hz 与 1000Hz 交替），方波或锯齿波，加少量混响模拟大堂空间。
警笛声用正弦波扫频（从 500Hz 上滑到 1500Hz 再下滑），叠加旋转的 Leslie 效果，并加入 Dopper 自动化（由远及近时音高和音量上升，经过时快速下降）。
多辆警车可通过左右声道错开扫频相位实现，避免完全同步。
背景可加入极轻微的人声喊叫、脚步声和无线电对讲机杂音，增强现场感。
混响采用中等室内（银行）与室外（街道）两层，警报以室内混响为主，警笛以室外开阔混响为主。
