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Generator Pink Noise

Titik tengah emas para noise. Pink noise berkurang 3 dB tiap oktaf: energi sama di setiap oktaf, yang bagi telinga manusia terdengar seimbang dan alami, seperti hujan yang tenang. Lebih lembut dari white, lebih terang dari brown.

pink noise
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Apa itu pink noise?

Pink noise adalah sinyal acak yang dayanya turun 3 dB setiap oktaf. Karena telinga bekerja per oktaf (tiap penggandaan frekuensi adalah satu "anak tangga"), pink noise terasa seragam di seluruh rentang: oktaf rendah terdengar sama beratnya dengan oktaf tinggi.

Spektrum "1/f" ada di mana-mana di alam - dari hujan dan ombak sampai statistik detak jantung. Sebagian karena itulah pink noise terdengar begitu akrab dan tidak mengganggu: pada dasarnya ia adalah suara lingkungan.

Tidur, fokus, dan kalibrasi

Untuk tidur, pink adalah pilihan mereka yang merasa white terlalu tajam: masking hampir sama, desisan lebih sedikit. Dalam studi kecil, denyut pink noise yang disinkronkan dengan tidur nyenyak memperdalamnya dan sedikit memperbaiki memori - hasil sederhana namun menjanjikan.

Di audio profesional, pink noise adalah sinyal kalibrasi standar: speaker dan ruangan disetel dengannya karena spektrumnya sesuai cara kita mendengar. Coba sistem Anda: putar pink noise dan dengarkan dari beberapa titik ruangan - lubang suara dan dengung langsung ketahuan.

Suara & alat terkait

White noiseBrown noiseTone generatorSemua warna noise (EN)

Pertanyaan umum tentang pink noise

Apa bedanya dengan white noise?

White berdaya sama per hertz - makanya terang dan mendesis. Pink turun 3 dB per oktaf - energi sama per oktaf, yang ditangkap telinga sebagai suara seimbang dan lebih gelap. Keduanya efektif untuk masking; pilih dengan telinga.

Benarkah memperbaiki tidur dan memori?

Beberapa studi kecil menunjukkan denyut singkat pink noise yang disinkronkan dengan gelombang lambat tidur memperdalam tidur dan sedikit meningkatkan konsolidasi memori. Memutarnya semalaman tidak menjamin efek itu - tapi sebagai masking untuk terlelap, ia bekerja sangat baik.

Kenapa speaker dikalibrasi dengan pink noise?

Karena energinya tersebar per oktaf persis seperti persepsi telinga: mengukur respons sistem dengan analyzer memperlihatkan kurva dalam "koordinat manusia". White noise terlalu berat di treble untuk pekerjaan ini.

Pink, white, atau brown untuk tidur?

Yang terbaik adalah yang berhenti Anda sadari. White masking-nya terkuat, pink jalan tengah, brown paling dalam dan lembut. Beri masing-masing dua malam pada volume minimum yang cukup, lalu pertahankan pemenangnya.

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