Table 3: Results of recognition experiments for environmental sounds in the original database.

Sound kind First stage rateFinal recognition rate

Boll impact 100%100%
Metal impact 100%95%
Door opening/closing 100%85%
Lock 100%95%
Switch on/off 100%100%
Typing 100%75%
Repeated typing 80%80%
Knock 90%90%
Telephone ringing 100%100%
Japanese vowels 100%100%

Average92.0%