diff --git a/services/api/app/ws/broadcaster.py b/services/api/app/ws/broadcaster.py
index fae9e00..c6cb430 100644
--- a/services/api/app/ws/broadcaster.py
+++ b/services/api/app/ws/broadcaster.py
@@ -3,24 +3,26 @@ from __future__ import annotations
 import asyncio
 from contextlib import suppress
 from datetime import timezone
-from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.db.session import SessionLocal
 from app.repositories.audio_repository import AudioRepository
-from app.ws.manager import manager
+from app.ws.router import manager  # используем тот же manager, что и в ws/router.py
 
 
 def _iso_z(dt) -> str:
-    # dt ожидается timezone-aware
     return dt.astimezone(timezone.utc).isoformat().replace("+00:00", "Z")
 
 
-async def audio_live_broadcaster(poll_interval_sec: float = 0.2) -> None:
+async def audio_live_broadcaster(poll_interval_sec: float = 0.05) -> None:
+    """
+    Poll latest row and broadcast only when a NEW row appears.
+    Throttling per client is handled by manager.broadcast_json().
+    """
     last_time = None
 
     while True:
         try:
-            async with SessionLocal() as db:  # AsyncSession
+            async with SessionLocal() as db:
                 repo = AudioRepository(db)
                 rows = await repo.latest(1)
                 if rows:
@@ -35,7 +37,7 @@ async def audio_live_broadcaster(poll_interval_sec: float = 0.2) -> None:
                             }
                         )
         except Exception:
-            # чтобы WS не умирал из-за временных проблем с БД
+            # не даём таске умереть при временных проблемах БД
             pass
 
         await asyncio.sleep(poll_interval_sec)
diff --git a/services/api/app/ws/manager.py b/services/api/app/ws/manager.py
index bc3c2c9..9901b46 100644
--- a/services/api/app/ws/manager.py
+++ b/services/api/app/ws/manager.py
@@ -1,39 +1,65 @@
 from __future__ import annotations
 
 import asyncio
+import time
+from dataclasses import dataclass
 from typing import Any
+
 from fastapi import WebSocket
 
 
+@dataclass(slots=True)
+class ClientConn:
+    ws: WebSocket
+    hz: int
+    min_interval: float
+    last_sent_monotonic: float
+
+
 class ConnectionManager:
     def __init__(self) -> None:
-        self._connections: set[WebSocket] = set()
+        self._conns: dict[WebSocket, ClientConn] = {}
         self._lock = asyncio.Lock()
 
-    async def connect(self, ws: WebSocket) -> None:
+    async def connect(self, ws: WebSocket, hz: int) -> None:
         await ws.accept()
+        now = time.monotonic()
+        client = ClientConn(
+            ws=ws, hz=hz, min_interval=1.0 / hz, last_sent_monotonic=0.0
+        )
+
         async with self._lock:
-            self._connections.add(ws)
+            self._conns[ws] = client
+
+        # Небольшой лог (можно заменить на structlog/loguru)
+        print(f"[ws] connected client={id(ws)} hz={hz} at={now:.3f}")
 
     async def disconnect(self, ws: WebSocket) -> None:
         async with self._lock:
-            self._connections.discard(ws)
+            existed = ws in self._conns
+            self._conns.pop(ws, None)
+        if existed:
+            print(f"[ws] disconnected client={id(ws)}")
 
     async def broadcast_json(self, payload: dict[str, Any]) -> None:
+        now = time.monotonic()
+
         async with self._lock:
-            conns = list(self._connections)
+            clients = list(self._conns.values())
 
         to_remove: list[WebSocket] = []
-        for ws in conns:
+        for c in clients:
+            # throttling per connection
+            if c.last_sent_monotonic and (now - c.last_sent_monotonic) < c.min_interval:
+                continue
+
             try:
-                await ws.send_json(payload)
+                await c.ws.send_json(payload)
+                c.last_sent_monotonic = now
             except Exception:
-                to_remove.append(ws)
+                to_remove.append(c.ws)
 
         if to_remove:
             async with self._lock:
                 for ws in to_remove:
-                    self._connections.discard(ws)
-
-
-manager = ConnectionManager()
+                    self._conns.pop(ws, None)
diff --git a/services/api/app/ws/router.py b/services/api/app/ws/router.py
index 785bb11..63e9bc3 100644
--- a/services/api/app/ws/router.py
+++ b/services/api/app/ws/router.py
@@ -1,19 +1,52 @@
-from fastapi import APIRouter, WebSocket
+from __future__ import annotations
+
+from fastapi import APIRouter, WebSocket, status
+from fastapi.exceptions import WebSocketException
 from starlette.websockets import WebSocketDisconnect
 
-from app.ws.manager import manager
+from app.ws.manager import ConnectionManager
 
 router = APIRouter()
+manager = ConnectionManager()
+
+DEFAULT_HZ = 10
+MIN_HZ = 1
+MAX_HZ = 60
+
+
+def _parse_hz(ws: WebSocket) -> int:
+    raw = ws.query_params.get("hz")
+    if raw is None:
+        return DEFAULT_HZ
+    try:
+        hz = int(raw)
+    except ValueError:
+        raise WebSocketException(
+            code=status.WS_1008_POLICY_VIOLATION, reason="Invalid 'hz' (int expected)"
+        )
+    if hz < MIN_HZ or hz > MAX_HZ:
+        raise WebSocketException(
+            code=status.WS_1008_POLICY_VIOLATION,
+            reason=f"Invalid 'hz' (allowed {MIN_HZ}..{MAX_HZ})",
+        )
+    return hz
 
 
 @router.websocket("/ws/live")
 async def ws_live(ws: WebSocket) -> None:
-    await manager.connect(ws)
+    hz = _parse_hz(ws)
+
+    await manager.connect(ws, hz=hz)
     try:
-        # Держим соединение
+        # Не обязательно принимать сообщения от клиента
+        # Но чтобы корректно ловить disconnect в некоторых клиентах - держим receive loop
         while True:
             await ws.receive_text()
     except WebSocketDisconnect:
         await manager.disconnect(ws)
+    except WebSocketException:
+        # если прилетит exception после accept — корректно удалим
+        await manager.disconnect(ws)
+        raise
     except Exception:
         await manager.disconnect(ws)