diff --git a/src/parser.c b/src/parser.c
index b6af5a6..58f2d7d 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -428,12 +428,10 @@ static int perform_piezo_sweep(void)
         for (uint8_t dummy = 0; dummy < PIEZO_DUMMY_CAPTURE_COUNT; dummy++)
         {
             k_busy_wait(PIEZO_AVG_INTER_BURST_GAP_US);
-            unsigned int key = irq_lock();
             piezo_burst_sw((uint8_t)cfg->cycles);
             k_busy_wait(capture_delay_us);
 
             err = echo_adc_capture(echo_capture, cfg->samples);
-            irq_unlock(key);
             if (err)
             {
                 DBG_PRINTF("[ECHO] dummy capture fail ch=%d dummy=%d err=%d\r\n", ch, dummy, err);
@@ -518,12 +516,10 @@ static int perform_single_piezo_capture(uint8_t cycles,
     for (uint8_t dummy = 0; dummy < PIEZO_DUMMY_CAPTURE_COUNT; dummy++)
     {
         k_busy_wait(PIEZO_AVG_INTER_BURST_GAP_US);
-        unsigned int key = irq_lock();
         piezo_burst_sw(cycles);
         k_busy_wait(delay_us);
 
         err = echo_adc_capture(echo_capture, num_samples);
-        irq_unlock(key);
         if (err)
         {
             return ECHO_STATUS_CAPTURE;