How to play a loud alert sound (beep) in Android

Asked Oct 15 '15 at 22:40

Active Oct 15 '15 at 23:48

Viewed 5,533 times

In my app I need to play a loud sound as an emergency alarm. I'm trying this but I would like to produce something louder if possible (the loudest I could get).

AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
audioManager.setStreamVolume(AudioManager.STREAM_DTMF, audioManager.getStreamMaxVolume(AudioManager.STREAM_DTMF), AudioManager.FLAG_PLAY_SOUND);

ToneGenerator tone = new ToneGenerator(AudioManager.STREAM_DTMF, 100); // 100 is max volume
tone.startTone(ToneGenerator.TONE_CDMA_ALERT_CALL_GUARD, 500); // 500ms

Do you know how to produce the loudest sound?

edited Oct 15 '15 at 23:48

asked Oct 15 '15 at 22:40

Ferran Maylinch

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Maybe this answer helps http://stackoverflow.com/a/13041314/1741542 – Olaf Dietsche Oct 15 '15 at 23:01
Thanks. Anyway, the device has a hardware button that triggers a very loud alarm (sounds like a siren, with changing pitch). I wanted to play that kind of loud sound. I'll try to figure out whether I can play that same sound or play something similar using any audio apis. – Ferran Maylinch Oct 15 '15 at 23:16
@Stephan : It's playing from loudspeaker – Ferran Maylinch Oct 15 '15 at 23:25
I'll investigate this way of generating arbitrary sounds: http://stackoverflow.com/a/3731075/1121497 – Ferran Maylinch Oct 15 '15 at 23:51
@FerranMaylinch did you manage to get it? – Mr. Unnormalized Posterior Aug 27 '17 at 19:47

How to play a loud alert sound (beep) in Android

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