Bosch PRAESENSA PRA-CSLD - Test Tones

PRAESENSA Tones | en 159
Bosch Security Systems B.V. Configuration manual 2020-09 | V1.20 | PRAESENSA 1.20
– Alarm_SW_650-1100-650Hz_50%_40x(0.125+0.125)s.wav
– Sweep 650 Hz - 1100 Hz, up and down in 0.125 s, 0.125 s off, 40 repetitions
– Duty cycle 50%, Peak level -6 dBFS, RMS level <-9 dBFS
– Offshore “H2S alarm”
19.3 Test tones
Test tones are mainly used for testing the audio output and loudspeaker zones (e.g. adjusting
the audio signal (filter) levels).
Filename format: Test_<purpose>_<duration>.wav
– Test_Loudspeaker_AB_20kHz_10s.wav
– Sine wave 20kHz, peak level -20dBFS, RMS level -23dBFS, 10s
– Inaudible signal to drive the A-group loudspeakers and check connectivity of the A-
and B-loudspeakers simultaneously while the building is occupied, the B-
loudspeakers get a 22kHz signal
– The A-loudspeakers are connected to their own zone amplifier channel; this zone
gets the 20kHz signal
– Keep smartphone in front of the loudspeaker, a smartphone spectrum analyzer
detects both the 20kHz and the 22kHz simultaneously
– Test_Loudspeaker_AB_22kHz_10s.wav
– Sine wave 22kHz, peak level -20dBFS, RMS level -23dBFS, 10s
– Inaudible signal to drive the B-group loudspeakers and check connectivity of the A-
and B-loudspeakers simultaneously while the building is occupied, the A-
loudspeakers get a 20kHz signal
– The B-loudspeakers are temporarily connected to another amplifier channel, for
another zone; this zone gets the 22kHz signal
– Keep smartphone in front of the loudspeaker, a smartphone spectrum analyzer
detects both the 20kHz and the 22kHz simultaneously
– Test_LoudspeakerPolarity_10s.wav
– Filtered sawtooth 50 Hz, peak level -12 dBFS, RMS level -20 dBFS, 10 s
– Audible signal to detect proper polarity of connected loudspeakers
– Smartphone oscilloscope detects a positive or negative sharp peak, that should be in
the same direction for all loudspeakers
– Test_PinkNoise_30s .wav
– Pink noise signal 20 Hz - 20 kHz, peak level -3 dBFS, RMS level -16 dBFS, 30 s
– Audible signal for acoustic measurements
– Test_Reference_440Hz_10s.wav
– Continuous 440 Hz sinewave, 10s
– Duty cycle 100%
– Test_STIPA_BedrockAudio_100s.wav
– STIPA testsignal, peak level - 4.2dBFS, RMS level -11dBFS, 100s
– Test signal to measure the speech intelligibility via the Speech Transmission Index
– Copyright Bedrock Audio BV (http://bedrock-audio.com), used with permission
– Compatible with all STIPA meters compliant to IEC60268‑16 Ed. 4 (Bedrock Audio,
NTi Audio, Audio Precision)
– The signal can be looped. A 440Hz beep signal of -12dBFS, duration 1s, marks the
beginning of the 100s test signal. Start the measurement after this beep, so the
measurement will not be disturbed by a gap between end and restart.
– A measurement cycle takes a minimum of 15s