| 摘要 |
<p>Portable device is formed by a standard smartphone (1) equipped with a display (1.8) and with a display processor (1.7) and it further comprises a processor unit (1.1) connected to an audio interface (1.2), the output of which is via a power amplifier (1.3) connected to a speaker (1.4), while the input of the audio interface (1.2) is connected via a microphone pre-amplifier (1.5) to the output of a microphone (1.6). The smartphone (1) is complemented with a control unit (2) formed by a pseudorandom signal generator (2.1) and a generator (2.2) of harmonic pulses sequence with variable frequencies, and these generators are connected to a measuring process timing block (2.3), which is bi-directionally interconnected with the processor unit (1.1). The output of the processor unit (1.1) is via a time records distribution block (2.4) connected both to a block (2.5) of initial calculation of a microphone-to-barrier distance and the overall barrier reflectivity, and also it is connected to a records time alignment block (2.6). The first output of the block (2.5) of initial calculation of the microphone-to-barrier distance and the overall barrier reflectivity is via the records time alignment block (2.6) and via the block (2.8) of the reflectivity coefficient calculation for individual frequencies connected to the first input of the display processor (1.7) of the display (1.8). To the second input of the display processor (1.7) of the display (1.8) is connected the second output of the block (2.5) of initial calculation of the microphone-to-barrier distance and the overall barrier reflectivity.</p> |
