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

Sound kind First stage rate Final 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% Average 92.0%