You should research and write about sound hooks. The little "happy sounds" of notifications, etc.

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Sonic logos were common in the realm of international shortwave broadcasts. Each station had its own Interval Signal, which was repeated over and over during breaks in actual broadcasts, or during the few minutes before a scheduled broadcast started. Tuning on shortwave was tricky, and you sometimes needed to try a different frequency when the atmosphere was being unfriendly to your usual frequency. Hearing the Interval Signal for Havana or BBC told you instantly that you were there, ready for the start of real programs.

Here's a good selection of the best and most famous:


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