Spec For TLSR827x-based BLE Audio Remote Control
PS-20033000-E1
27
Ver.0.1.0
4.2
Audio Performance
Audio performance meets Google and Nuance requirements. Detail requirements as below table.
Table 4-2Audio performance requirement
Item
Requirement
Sample Size
16 bits
Sample Rate
16 kHz
Channels
1 channel
Frequency Response
(after software EQ is applied)
+/- 3dB from 250 Hz – 4 kHz
+/- 4dB from 4kHz – 7.3 kHz
Dynamic Range
≥72 dBA
Sensitivity
90 dB SPL @ 1kHz will produce RMS of 2500 for 16 bit
sample (-19.34 dBFS) equivalent to 94dBSPL=> -15.34 dBFS
DC Offset
DC offset shall be avoided
Linearity
Amplitude should linearly track input SPL changes over at least
a 30dB range from -18dB to +12dB, With coefficient of
determination, R2>0.99.
THD
<1% @ 90dB SPL measured at 1kHz at the microphone, <5%
@ 90dB SPL measured at 1kHz entire system.
SNR
40 dBA @ 90dB SPL measured at 1kHz entire system.
