Audio Performance; Table 4-2Audio Performance Requirement - TELink TLSR827 Series Manual

4.2 Audio Performance

Audio performance meets Google and Nuance requirements. Detail requirements as below table.
Item
Sample Size
Sample Rate
Channels
Frequency Response
(after software EQ is applied)
Dynamic Range
Sensitivity
DC Offset
Linearity
THD
SNR
PS-20033000-E1
Spec For TLSR827x-based BLE Audio Remote Control

Table 4-2Audio performance requirement

16 bits
16 kHz
1 channel
+/- 3dB from 250 Hz – 4 kHz
+/- 4dB from 4kHz – 7.3 kHz
≥72 dBA
90 dB SPL @ 1kHz will produce RMS of 2500 for 16 bit
sample (-19.34 dBFS) equivalent to 94dBSPL=> -15.34 dBFS
DC offset shall be avoided
Amplitude should linearly track input SPL changes over at least
a 30dB range from -18dB to +12dB, With coefficient of
determination, R2>0.99.
<1% @ 90dB SPL measured at 1kHz at the microphone, <5%
@ 90dB SPL measured at 1kHz entire system.
40 dBA @ 90dB SPL measured at 1kHz entire system.
27
Requirement
Ver.0.1.0